Metadata
| Key | Value |
|---|---|
| engine | modal |
| prompt | completion |
| temp | 0.2 |
| top_p | 0.95 |
| max_new_tokens | 1024 |
| n_completions | 10 |
Solutions
typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
guard let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON else {
throw ParsingError.invalidInput
}
return json
}
func parse(data: Data) throws -> JSON {
guard let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON else {
throw ParsingError.invalidInput
}
return json
}
func parse(url: URL) throws -> JSON {
guard let data = try Data(contentsOf: url) else {
throw ParsingError.invalidInput
}
guard let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON else {
throw ParsingError.invalidInput
}
return json
}
func parse(url: URL, completion: @escaping (Result<JSON, ParsingError>) -> Void) {
URLSession.shared.dataTask(with: url) { data, response, error in
if let error = error {
completion(.failure(.internalError(error)))
} else if let data = data, let json = try? JSONSerialization.jsonObject(with: data, options: []) as? JSON {
completion(.success(json))
} else {
completion(.failure(.invalidInput))
}
}.resume()
}```swift
typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
guard let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON else {
throw ParsingError.invalidInput
}
return json
}
// JSON parser, returns custom error type in case of failures.
func parse(data: Data) throws -> JSON {
guard let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON else {
throw ParsingError.invalidInput
}
return json
}
// JSON parser, returns custom error type in case of failures.
func parse(url: URL) throws -> JSON {
guard let data = try Data(contentsOf: url) else {
throw ParsingError.invalidInput
}
guard let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON else {
throw ParsingError.invalidInput
}
return json
}
// JSON parser, returns custom error type in case of failures.
func parse(url: URL, completion: @escaping (Result<JSON, ParsingError>) -> Void) {
URLSession.shared.dataTask(with: url) { data, response, error in
if let error = error {
completion(.failure(.internalError(error)))
} else if let data = data, let json = try? JSONSerialization.jsonObject(with: data, options: []) as? JSON {
completion(.success(json))
} else {
completion(.failure(.invalidInput))
}
}.resume()
}
```guard let data = try Data(contentsOf: url) else { // initializer for conditional binding must have Optional type, not 'Data'typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
//...
}
func parse(data: Data) throws -> JSON {
//...
}
func parse(url: URL) throws -> JSON {
//...
}
func parse(url: URL, completion: @escaping (Result<JSON, ParsingError>) -> Void) {
//...
}```swift
typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
//...
}
// JSON parser, returns custom error type in case of failures.
func parse(data: Data) throws -> JSON {
//...
}
// JSON parser, returns custom error type in case of failures.
func parse(url: URL) throws -> JSON {
//...
}
// JSON parser, returns custom error type in case of failures.
func parse(url: URL, completion: @escaping (Result<JSON, ParsingError>) -> Void) {
//...
}
```} // missing return in global function expected to return 'JSON' (aka 'Dictionary<String, Any>')} // missing return in global function expected to return 'JSON' (aka 'Dictionary<String, Any>')} // missing return in global function expected to return 'JSON' (aka 'Dictionary<String, Any>')typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
guard let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON else {
throw ParsingError.invalidInput
}
return json
}```swift
typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
guard let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON else {
throw ParsingError.invalidInput
}
return json
}
``` // XCTAssertTrue failedtypealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
guard let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON else {
throw ParsingError.invalidInput
}
return json
}
func parse(data: Data) throws -> JSON {
guard let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON else {
throw ParsingError.invalidInput
}
return json
}
func parse(url: URL) throws -> JSON {
guard let data = try Data(contentsOf: url) else {
throw ParsingError.invalidInput
}
return try parse(data: data)
}
func parse(url: URL, completion: @escaping (Result<JSON, ParsingError>) -> Void) {
URLSession.shared.dataTask(with: url) { data, response, error in
if let error = error {
completion(.failure(.internalError(error)))
return
}
guard let data = data else {
completion(.failure(.invalidInput))
return
}
do {
let json = try parse(data: data)
completion(.success(json))
} catch {
completion(.failure(.internalError(error)))
}
}.resume()
}```swift
typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
guard let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON else {
throw ParsingError.invalidInput
}
return json
}
// JSON parser, returns custom error type in case of failures.
func parse(data: Data) throws -> JSON {
guard let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON else {
throw ParsingError.invalidInput
}
return json
}
// JSON parser, returns custom error type in case of failures.
func parse(url: URL) throws -> JSON {
guard let data = try Data(contentsOf: url) else {
throw ParsingError.invalidInput
}
return try parse(data: data)
}
// JSON parser, returns custom error type in case of failures.
func parse(url: URL, completion: @escaping (Result<JSON, ParsingError>) -> Void) {
URLSession.shared.dataTask(with: url) { data, response, error in
if let error = error {
completion(.failure(.internalError(error)))
return
}
guard let data = data else {
completion(.failure(.invalidInput))
return
}
do {
let json = try parse(data: data)
completion(.success(json))
} catch {
completion(.failure(.internalError(error)))
}
}.resume()
}
```guard let data = try Data(contentsOf: url) else { // initializer for conditional binding must have Optional type, not 'Data'typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
guard let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON else {
throw ParsingError.invalidInput
}
return json
}
func parse(data: Data) throws -> JSON {
guard let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON else {
throw ParsingError.invalidInput
}
return json
}
func parse(url: URL) throws -> JSON {
guard let data = try Data(contentsOf: url) else {
throw ParsingError.invalidInput
}
return try parse(data: data)
}
func parse(file: String) throws -> JSON {
guard let data = try Data(contentsOf: URL(fileURLWithPath: file)) else {
throw ParsingError.invalidInput
}
return try parse(data: data)
}```swift
typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
guard let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON else {
throw ParsingError.invalidInput
}
return json
}
// JSON parser, returns custom error type in case of failures.
func parse(data: Data) throws -> JSON {
guard let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON else {
throw ParsingError.invalidInput
}
return json
}
// JSON parser, returns custom error type in case of failures.
func parse(url: URL) throws -> JSON {
guard let data = try Data(contentsOf: url) else {
throw ParsingError.invalidInput
}
return try parse(data: data)
}
// JSON parser, returns custom error type in case of failures.
func parse(file: String) throws -> JSON {
guard let data = try Data(contentsOf: URL(fileURLWithPath: file)) else {
throw ParsingError.invalidInput
}
return try parse(data: data)
}
```guard let data = try Data(contentsOf: url) else { // initializer for conditional binding must have Optional type, not 'Data'guard let data = try Data(contentsOf: URL(fileURLWithPath: file)) else { // initializer for conditional binding must have Optional type, not 'Data'typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
guard let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON else {
throw ParsingError.invalidInput
}
return json
}
func parse(data: Data) throws -> JSON {
guard let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON else {
throw ParsingError.invalidInput
}
return json
}
func parse(url: URL) throws -> JSON {
guard let data = try Data(contentsOf: url) else {
throw ParsingError.invalidInput
}
return try parse(data: data)
}
func parse(file: URL) throws -> JSON {
guard let data = try Data(contentsOf: file) else {
throw ParsingError.invalidInput
}
return try parse(data: data)
}
func parse(file: String) throws -> JSON {
guard let url = URL(string: file) else {
throw ParsingError.invalidInput
}
return try parse(url: url)
}```swift
typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
guard let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON else {
throw ParsingError.invalidInput
}
return json
}
// JSON parser, returns custom error type in case of failures.
func parse(data: Data) throws -> JSON {
guard let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON else {
throw ParsingError.invalidInput
}
return json
}
// JSON parser, returns custom error type in case of failures.
func parse(url: URL) throws -> JSON {
guard let data = try Data(contentsOf: url) else {
throw ParsingError.invalidInput
}
return try parse(data: data)
}
// JSON parser, returns custom error type in case of failures.
func parse(file: URL) throws -> JSON {
guard let data = try Data(contentsOf: file) else {
throw ParsingError.invalidInput
}
return try parse(data: data)
}
// JSON parser, returns custom error type in case of failures.
func parse(file: String) throws -> JSON {
guard let url = URL(string: file) else {
throw ParsingError.invalidInput
}
return try parse(url: url)
}
// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
guard let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON else {
throw ParsingError.invalidInput
}
return json
}
// JSON parser, returns custom error type in case of failures.
func parse(data: Data) throws -> JSON {
guard let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON else {
throw ParsingError.invalidInput
}
return json
}
// JSON parser, returns custom error type in case of failures.
func parse(url: URL) throws -> JSON {
guard let data = try Data(contentsOf: url) else {
throw ParsingError.invalidInput
}
return try parse(data: data)
}
// JSON parser, returns custom error type in case of failures.
func parse(file: URL) throws -> JSON {
guard let data = try Data(contentsOf: file) else {
throw ParsingError.invalidInput
}
return try parse(data: data)
}
// JSON parser, returns custom error type in case of failures.
func parse(file: String) throws -> JSON {
guard let url = URL(string: file) else {
throw ParsingError.invalidInput
}
return try parse(url: url)
}
// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
guard let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON else {
throw ParsingError.invalidInput
}
return json
}
// JSON parser, returns custom error type in case of failures.
func parse(data: Data) throws -> JSON {
guard let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON else {
throw ParsingError.invalidInput
}
return json
}
// JSON parser, returns custom error type in case of failures.
func parse(url: URL) throws -> JSON {
guard let data = try Data(contentsOf: url) else {
throw ParsingError.invalidInput
}
return try parse(data: data)
}
// JSON parser, returns custom error type in case of failures.
func parse(file: URL) throws -> JSON {
guard let data = try Data(contentsOf: file) else {
throw ParsingError.invalidInput
}
return try parse(data: data)
}
// JSON parser, returns custom error type in case of failures.
func parse(file: String) throws -> JSON {
guard let url = URL(string: file) else {
throw ParsingError.invalidInput
}
return try parse(url: url)
}
// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
guard let data = string.data(guard let data = try Data(contentsOf: url) else { // initializer for conditional binding must have Optional type, not 'Data'guard let data = try Data(contentsOf: file) else { // initializer for conditional binding must have Optional type, not 'Data'typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
guard let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON else {
throw ParsingError.invalidInput
}
return json
}
func parse(data: Data) throws -> JSON {
guard let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON else {
throw ParsingError.invalidInput
}
return json
}
func parse(url: URL) throws -> JSON {
guard let data = try Data(contentsOf: url) else {
throw ParsingError.invalidInput
}
return try parse(data: data)
}
func parse(url: URL, completion: @escaping (Result<JSON, ParsingError>) -> Void) {
URLSession.shared.dataTask(with: url) { data, response, error in
if let error = error {
completion(.failure(.internalError(error)))
} else if let data = data {
do {
let json = try parse(data: data)
completion(.success(json))
} catch {
completion(.failure(.internalError(error)))
}
} else {
completion(.failure(.invalidInput))
}
}.resume()
}```swift
typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
guard let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON else {
throw ParsingError.invalidInput
}
return json
}
// JSON parser, returns custom error type in case of failures.
func parse(data: Data) throws -> JSON {
guard let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON else {
throw ParsingError.invalidInput
}
return json
}
// JSON parser, returns custom error type in case of failures.
func parse(url: URL) throws -> JSON {
guard let data = try Data(contentsOf: url) else {
throw ParsingError.invalidInput
}
return try parse(data: data)
}
// JSON parser, returns custom error type in case of failures.
func parse(url: URL, completion: @escaping (Result<JSON, ParsingError>) -> Void) {
URLSession.shared.dataTask(with: url) { data, response, error in
if let error = error {
completion(.failure(.internalError(error)))
} else if let data = data {
do {
let json = try parse(data: data)
completion(.success(json))
} catch {
completion(.failure(.internalError(error)))
}
} else {
completion(.failure(.invalidInput))
}
}.resume()
}
```guard let data = try Data(contentsOf: url) else { // initializer for conditional binding must have Optional type, not 'Data'typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
guard let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON else {
throw ParsingError.invalidInput
}
return json
}```swift
typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
guard let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON else {
throw ParsingError.invalidInput
}
return json
}
``` // XCTAssertTrue failedtypealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
guard let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON else {
throw ParsingError.invalidInput
}
return json
}
func parse(data: Data) throws -> JSON {
guard let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON else {
throw ParsingError.invalidInput
}
return json
}
func parse(url: URL) throws -> JSON {
guard let data = try Data(contentsOf: url) else {
throw ParsingError.invalidInput
}
return try parse(data: data)
}
func parse(url: URL, completion: @escaping (Result<JSON, ParsingError>) -> Void) {
URLSession.shared.dataTask(with: url) { data, response, error in
if let error = error {
completion(.failure(.internalError(error)))
return
}
guard let data = data else {
completion(.failure(.invalidInput))
return
}
do {
let json = try parse(data: data)
completion(.success(json))
} catch {
completion(.failure(.internalError(error)))
}
}.resume()
}```swift
typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
guard let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON else {
throw ParsingError.invalidInput
}
return json
}
// JSON parser, returns custom error type in case of failures.
func parse(data: Data) throws -> JSON {
guard let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON else {
throw ParsingError.invalidInput
}
return json
}
// JSON parser, returns custom error type in case of failures.
func parse(url: URL) throws -> JSON {
guard let data = try Data(contentsOf: url) else {
throw ParsingError.invalidInput
}
return try parse(data: data)
}
// JSON parser, returns custom error type in case of failures.
func parse(url: URL, completion: @escaping (Result<JSON, ParsingError>) -> Void) {
URLSession.shared.dataTask(with: url) { data, response, error in
if let error = error {
completion(.failure(.internalError(error)))
return
}
guard let data = data else {
completion(.failure(.invalidInput))
return
}
do {
let json = try parse(data: data)
completion(.success(json))
} catch {
completion(.failure(.internalError(error)))
}
}.resume()
}
```guard let data = try Data(contentsOf: url) else { // initializer for conditional binding must have Optional type, not 'Data'typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
guard let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON else {
throw ParsingError.invalidInput
}
return json
}
func parse(data: Data) throws -> JSON {
guard let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON else {
throw ParsingError.invalidInput
}
return json
}
func parse(url: URL) throws -> JSON {
guard let data = try Data(contentsOf: url) else {
throw ParsingError.invalidInput
}
return try parse(data: data)
}
func parse(url: URL, completion: @escaping (Result<JSON, ParsingError>) -> Void) {
URLSession.shared.dataTask(with: url) { data, response, error in
if let error = error {
completion(.failure(.internalError(error)))
return
}
guard let data = data else {
completion(.failure(.invalidInput))
return
}
do {
let json = try parse(data: data)
completion(.success(json))
} catch {
completion(.failure(.internalError(error)))
}
}.resume()
}```swift
typealias JSON = [String: Any]
enum ParsingError: Error {
case invalidInput
case internalError(Error)
}
// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
guard let data = string.data(using:.utf8) else {
throw ParsingError.invalidInput
}
guard let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON else {
throw ParsingError.invalidInput
}
return json
}
// JSON parser, returns custom error type in case of failures.
func parse(data: Data) throws -> JSON {
guard let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON else {
throw ParsingError.invalidInput
}
return json
}
// JSON parser, returns custom error type in case of failures.
func parse(url: URL) throws -> JSON {
guard let data = try Data(contentsOf: url) else {
throw ParsingError.invalidInput
}
return try parse(data: data)
}
// JSON parser, returns custom error type in case of failures.
func parse(url: URL, completion: @escaping (Result<JSON, ParsingError>) -> Void) {
URLSession.shared.dataTask(with: url) { data, response, error in
if let error = error {
completion(.failure(.internalError(error)))
return
}
guard let data = data else {
completion(.failure(.invalidInput))
return
}
do {
let json = try parse(data: data)
completion(.success(json))
} catch {
completion(.failure(.internalError(error)))
}
}.resume()
}
```guard let data = try Data(contentsOf: url) else { // initializer for conditional binding must have Optional type, not 'Data'indirect enum HTMLNode {
case text(_ content: String)
case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
let attributesString = attributes.isEmpty? "" : " " + attributes.map { "\($0.key)=\($0.value)" }.joined(separator: " ")
let childrenString = children.isEmpty? "" : children.map { generate($0) }.joined(separator: "")
return "<\(name)\(attributesString)>\(childrenString)</\(name)>"
}
}```swift
indirect enum HTMLNode {
case text(_ content: String)
case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}
// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
let attributesString = attributes.isEmpty? "" : " " + attributes.map { "\($0.key)=\($0.value)" }.joined(separator: " ")
let childrenString = children.isEmpty? "" : children.map { generate($0) }.joined(separator: "")
return "<\(name)\(attributesString)>\(childrenString)</\(name)>"
}
}
// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
let attributesString = attributes.isEmpty? "" : " " + attributes.map { "\($0.key)=\($0.value)" }.joined(separator: " ")
let childrenString = children.isEmpty? "" : children.map { generate($0) }.joined(separator: "")
return "<\(name)\(attributesString)>\(childrenString)</\(name)>"
}
}
// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
let attributesString = attributes.isEmpty? "" : " " + attributes.map { "\($0.key)=\($0.value)" }.joined(separator: " ")
let childrenString = children.isEmpty? "" : children.map { generate($0) }.joined(separator: "")
return "<\(name)\(attributesString)>\(childrenString)</\(name)>"
}
}
// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
let attributesString = attributes.isEmpty? "" : " " + attributes.map { "\($0.key)=\($0.value)" }.joined(separator: " ")
let childrenString = children.isEmpty? "" : children.map { generate($0) }.joined(separator: "")
return "<\(name)\(attributesString)>\(childrenString)</\(name)>"
}
}
// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
let attributesString = attributes.isEmpty? "" : " " + attributes.map { "\($0.key)=\($0.value)" }.joined(separator: " ")
let childrenString = children.isEmpty? "" : children.map { generate($0) }.joined(separator: "")
return "<\(name)\(attributesString)>\(childrenString)</\(name)>"
}
}
// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
let attributesString = attributes.isEmpty? "" : " " + attributes.map { "\($0.key)=\($0.value)" }.joined(separator: " ")
let childrenString = children.isEmpty? "" : children.map { generate($0) }.joined(separator: "")
return "<\(name)\(attributesString)>\(childrenString)</\(name)>"
}
}
// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
let attributesString = attributes.isEmpty? "" : " " + attributes.map { "\($0.key)=\($0.value)" }.joined(separatorlet attributesString = attributes.isEmpty? "" : " " + attributes.map { "\($0.key)=\($0.value)" }.joined(separator: " ") // consecutive statements on a line must be separated by ';'let attributesString = attributes.isEmpty? "" : " " + attributes.map { "\($0.key)=\($0.value)" }.joined(separator: " ") // expected expressionlet attributesString = attributes.isEmpty? "" : " " + attributes.map { "\($0.key)=\($0.value)" }.joined(separator: " ") // string literal is unusedlet attributesString = attributes.isEmpty? "" : " " + attributes.map { "\($0.key)=\($0.value)" }.joined(separator: " ") // consecutive statements on a line must be separated by ';'let attributesString = attributes.isEmpty? "" : " " + attributes.map { "\($0.key)=\($0.value)" }.joined(separator: " ") // cannot use optional chaining on non-optional value of type 'Bool'let childrenString = children.isEmpty? "" : children.map { generate($0) }.joined(separator: "") // consecutive statements on a line must be separated by ';'let childrenString = children.isEmpty? "" : children.map { generate($0) }.joined(separator: "") // string literal is unusedlet childrenString = children.isEmpty? "" : children.map { generate($0) }.joined(separator: "") // expected expressionlet childrenString = children.isEmpty? "" : children.map { generate($0) }.joined(separator: "") // cannot use optional chaining on non-optional value of type 'Bool'let childrenString = children.isEmpty? "" : children.map { generate($0) }.joined(separator: "") // consecutive statements on a line must be separated by ';'indirect enum HTMLNode {
case text(_ content: String)
case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
let attributesString = attributes.map { "\($0.key)=\"\($0.value)\"" }.joined(separator: " ")
let childrenString = children.map { generate($0) }.joined(separator: "\n")
return "<\(name) \(attributesString)>\n\(childrenString)\n</\(name)>"
}
}```swift
indirect enum HTMLNode {
case text(_ content: String)
case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}
// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
let attributesString = attributes.map { "\($0.key)=\"\($0.value)\"" }.joined(separator: " ")
let childrenString = children.map { generate($0) }.joined(separator: "\n")
return "<\(name) \(attributesString)>\n\(childrenString)\n</\(name)>"
}
}
// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
let attributesString = attributes.map { "\($0.key)=\"\($0.value)\"" }.joined(separator: " ")
let childrenString = children.map { generate($0) }.joined(separator: "\n")
return "<\(name) \(attributesString)>\n\(childrenString)\n</\(name)>"
}
}
```Start: a ["href": "swifteval"] // XCTAssertEqual failed: (Start: div [:]indirect enum HTMLNode {
case text(_ content: String)
case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
let childrenString = children.map { generate($0) }.joined(separator: "\n")
return "<\(name) \(attributesString)>\n\(childrenString)\n</\(name)>"
}
}```swift
indirect enum HTMLNode {
case text(_ content: String)
case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}
// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
let childrenString = children.map { generate($0) }.joined(separator: "\n")
return "<\(name) \(attributesString)>\n\(childrenString)\n</\(name)>"
}
}
```Start: a ["href": "swifteval"] // XCTAssertEqual failed: (Start: div [:]indirect enum HTMLNode {
case text(_ content: String)
case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
let attributesString = attributes.map { "\($0.key)=\"\($0.value)\"" }.joined(separator: " ")
let childrenString = children.map { generate($0) }.joined(separator: "")
return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
}
}```swift
indirect enum HTMLNode {
case text(_ content: String)
case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}
// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
let attributesString = attributes.map { "\($0.key)=\"\($0.value)\"" }.joined(separator: " ")
let childrenString = children.map { generate($0) }.joined(separator: "")
return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
}
}
```indirect enum HTMLNode {
case text(_ content: String)
case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
let attributesString = attributes.map { "\($0)=\($1)" }.joined(separator: " ")
let childrenString = children.map { generate($0) }.joined(separator: "")
return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
}
}```swift
indirect enum HTMLNode {
case text(_ content: String)
case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}
// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
let attributesString = attributes.map { "\($0)=\($1)" }.joined(separator: " ")
let childrenString = children.map { generate($0) }.joined(separator: "")
return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
}
}
// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
let attributesString = attributes.map { "\($0)=\($1)" }.joined(separator: " ")
let childrenString = children.map { generate($0) }.joined(separator: "")
return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
}
}
```Start: a ["href": "swifteval"] // XCTAssertEqual failed: (Start: div [:]indirect enum HTMLNode {
case text(_ content: String)
case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
let attributesString = attributes.map { "\($0.key)=\"\($0.value)\"" }.joined(separator: " ")
let childrenString = children.map { generate($0) }.joined(separator: "\n")
return "<\(name) \(attributesString)>\n\(childrenString)\n</\(name)>"
}
}```swift
indirect enum HTMLNode {
case text(_ content: String)
case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}
// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
let attributesString = attributes.map { "\($0.key)=\"\($0.value)\"" }.joined(separator: " ")
let childrenString = children.map { generate($0) }.joined(separator: "\n")
return "<\(name) \(attributesString)>\n\(childrenString)\n</\(name)>"
}
}
```Start: a ["href": "swifteval"] // XCTAssertEqual failed: (Start: div [:]indirect enum HTMLNode {
case text(_ content: String)
case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
let attributesString = attributes.map { "\($0.key)=\"\($0.value)\"" }.joined(separator: " ")
let childrenString = children.map { generate($0) }.joined(separator: "")
return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
}
}```swift
indirect enum HTMLNode {
case text(_ content: String)
case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}
// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
let attributesString = attributes.map { "\($0.key)=\"\($0.value)\"" }.joined(separator: " ")
let childrenString = children.map { generate($0) }.joined(separator: "")
return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
}
}
// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
let attributesString = attributes.map { "\($0.key)=\"\($0.value)\"" }.joined(separator: " ")
let childrenString = children.map { generate($0) }.joined(separator: "")
return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
}
}
```indirect enum HTMLNode {
case text(_ content: String)
case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
let childrenString = children.map { generate($0) }.joined(separator: "")
return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
}
}```swift
indirect enum HTMLNode {
case text(_ content: String)
case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}
// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
let childrenString = children.map { generate($0) }.joined(separator: "")
return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
}
}
```indirect enum HTMLNode {
case text(_ content: String)
case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
let attributesString = attributes.map { "\($0)=\($1)" }.joined(separator: " ")
let childrenString = children.map { generate($0) }.joined(separator: "\n")
return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
}
}```swift
indirect enum HTMLNode {
case text(_ content: String)
case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}
// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
let attributesString = attributes.map { "\($0)=\($1)" }.joined(separator: " ")
let childrenString = children.map { generate($0) }.joined(separator: "\n")
return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
}
}
// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
let attributesString = attributes.map { "\($0)=\($1)" }.joined(separator: " ")
let childrenString = children.map { generate($0) }.joined(separator: "\n")
return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
}
}
// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
let attributesString = attributes.map { "\($0)=\($1)" }.joined(separator: " ")
let childrenString = children.map { generate($0) }.joined(separator: "\n")
return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
}
}
// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
let attributesString = attributes.map { "\($0)=\($1)" }.joined(separator: " ")
let childrenString = children.map { generate($0) }.joined(separator: "\n")
return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
}
}
// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
let attributesString = attributes.map { "\($0)=\($1)" }.joined(separator: " ")
let childrenString = children.map { generate($0) }.joined(separator: "\n")
return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
}
}
// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
let attributesString = attributes.map { "\($0)=\($1)" }.joined(separator: " ")
let childrenString = children.map { generate($0) }.joined(separator: "\n")
return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
}
}
// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
let attributesString = attributes.map { "\($0)=\($1)" }.joined(separator: " ")
let childrenString = children.map { generate($0) }.joined(separator: "\n")
return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
}
}
// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let nameStart: a ["href": "swifteval"] // XCTAssertEqual failed: (Start: div [:]indirect enum HTMLNode {
case text(_ content: String)
case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
let childrenString = children.map { generate($0) }.joined(separator: "")
return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
}
}```swift
indirect enum HTMLNode {
case text(_ content: String)
case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}
// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
let childrenString = children.map { generate($0) }.joined(separator: "")
return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
}
}
// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
switch tree {
case.text(let content):
return content
case.element(let name, let attributes, let children):
let attributesString = attributes.map { "\($0)=\"\($1)\"" }.joined(separator: " ")
let childrenString = children.map { generate($0) }.joined(separator: "")
return "<\(name) \(attributesString)>\(childrenString)</\(name)>"
}
}
```enum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
let tokens = string.split(separator: " ").map { String($0) }
var stack = [Double]()
var sign = 1
var result = 0.0
for token in tokens {
switch token {
case "+":
sign = 1
case "-":
sign = -1
case "(":
stack.append(sign)
sign = 1
case ")":
sign = stack.removeLast()
default:
guard let number = Double(token) else {
throw CalculateError.invalidInput
}
result += sign * number
}
}
return result
}```swift
enum CalculateError: Error {
case invalidInput
}
// Calculator which supports operations from readable string format.
// Valid tokens is "+-*/()", example input is "2+2*2".
func calculate(_ string: String) throws -> Double {
let tokens = string.split(separator: " ").map { String($0) }
var stack = [Double]()
var sign = 1
var result = 0.0
for token in tokens {
switch token {
case "+":
sign = 1
case "-":
sign = -1
case "(":
stack.append(sign)
sign = 1
case ")":
sign = stack.removeLast()
default:
guard let number = Double(token) else {
throw CalculateError.invalidInput
}
result += sign * number
}
}
return result
}
do {
let result = try calculate("2+2*2")
print(result)
} catch {
print(error)
}
```stack.append(sign) // cannot convert value of type 'Int' to expected argument type 'Double'sign = stack.removeLast() // cannot assign value of type 'Double' to type 'Int'result += sign * number // cannot convert value of type 'Int' to expected argument type 'Double'enum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
//...
}```swift
enum CalculateError: Error {
case invalidInput
}
// Calculator which supports operations from readable string format.
// Valid tokens is "+-*/()", example input is "2+2*2".
func calculate(_ string: String) throws -> Double {
//...
}
```} // missing return in global function expected to return 'Double'enum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
//...
}```swift
enum CalculateError: Error {
case invalidInput
}
// Calculator which supports operations from readable string format.
// Valid tokens is "+-*/()", example input is "2+2*2".
func calculate(_ string: String) throws -> Double {
//...
}
```} // missing return in global function expected to return 'Double'enum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
//...
}```swift
enum CalculateError: Error {
case invalidInput
}
// Calculator which supports operations from readable string format.
// Valid tokens is "+-*/()", example input is "2+2*2".
func calculate(_ string: String) throws -> Double {
//...
}
```} // missing return in global function expected to return 'Double'enum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
//...
}```swift
enum CalculateError: Error {
case invalidInput
}
// Calculator which supports operations from readable string format.
// Valid tokens is "+-*/()", example input is "2+2*2".
func calculate(_ string: String) throws -> Double {
//...
}
```} // missing return in global function expected to return 'Double'enum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
//...
}```swift
enum CalculateError: Error {
case invalidInput
}
// Calculator which supports operations from readable string format.
// Valid tokens is "+-*/()", example input is "2+2*2".
func calculate(_ string: String) throws -> Double {
//...
}
```} // missing return in global function expected to return 'Double'enum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
//...
}```swift
enum CalculateError: Error {
case invalidInput
}
// Calculator which supports operations from readable string format.
// Valid tokens is "+-*/()", example input is "2+2*2".
func calculate(_ string: String) throws -> Double {
//...
}
```} // missing return in global function expected to return 'Double'enum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
let tokens = string.map { String($0) }
let stack = Stack<Double>()
let operations: [String: (Double, Double) -> Double] = [
"+": (+),
"-": (-),
"*": (*),
"/": (/),
]
for token in tokens {
if let value = Double(token) {
stack.push(value)
} else if let operation = operations[token] {
guard let right = stack.pop(), let left = stack.pop() else {
throw CalculateError.invalidInput
}
stack.push(operation(left, right))
}
}
guard let result = stack.pop() else {
throw CalculateError.invalidInput
}
return result
}```swift
enum CalculateError: Error {
case invalidInput
}
// Calculator which supports operations from readable string format.
// Valid tokens is "+-*/()", example input is "2+2*2".
func calculate(_ string: String) throws -> Double {
let tokens = string.map { String($0) }
let stack = Stack<Double>()
let operations: [String: (Double, Double) -> Double] = [
"+": (+),
"-": (-),
"*": (*),
"/": (/),
]
for token in tokens {
if let value = Double(token) {
stack.push(value)
} else if let operation = operations[token] {
guard let right = stack.pop(), let left = stack.pop() else {
throw CalculateError.invalidInput
}
stack.push(operation(left, right))
}
}
guard let result = stack.pop() else {
throw CalculateError.invalidInput
}
return result
}
```let stack = Stack<Double>() // cannot find 'Stack' in scopeenum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
let tokens = string.components(separatedBy:.whitespacesAndNewlines)
var stack = [Double]()
var sign = 1
var result = 0.0
for token in tokens {
switch token {
case "+":
sign = 1
case "-":
sign = -1
case "(":
stack.append(Double(sign) * result)
result = 0
sign = 1
case ")":
result += Double(sign) * result
result = stack.removeLast()
default:
guard let number = Double(token) else {
throw CalculateError.invalidInput
}
result += Double(sign) * number
}
}
return result
}```swift
enum CalculateError: Error {
case invalidInput
}
// Calculator which supports operations from readable string format.
// Valid tokens is "+-*/()", example input is "2+2*2".
func calculate(_ string: String) throws -> Double {
let tokens = string.components(separatedBy:.whitespacesAndNewlines)
var stack = [Double]()
var sign = 1
var result = 0.0
for token in tokens {
switch token {
case "+":
sign = 1
case "-":
sign = -1
case "(":
stack.append(Double(sign) * result)
result = 0
sign = 1
case ")":
result += Double(sign) * result
result = stack.removeLast()
default:
guard let number = Double(token) else {
throw CalculateError.invalidInput
}
result += Double(sign) * number
}
}
return result
}
``` // Fatal error: Error raised at top level: Solution.CalculateError.invalidInputenum CalculateError: Error {
case invalidInput
}
func calculate(_ string: String) throws -> Double {
//...
}```swift
enum CalculateError: Error {
case invalidInput
}
// Calculator which supports operations from readable string format.
// Valid tokens is "+-*/()", example input is "2+2*2".
func calculate(_ string: String) throws -> Double {
//...
}
```} // missing return in global function expected to return 'Double'func execute(binary: String, arguments: [String]) -> (String, String) {
let process = Process()
process.launchPath = binary
process.arguments = arguments
let stdoutPipe = Pipe()
process.standardOutput = stdoutPipe
let stderrPipe = Pipe()
process.standardError = stderrPipe
process.launch()
let stdoutData = stdoutPipe.fileHandleForReading.readDataToEndOfFile()
let stdout = String(data: stdoutData, encoding:.utf8)?? ""
let stderrData = stderrPipe.fileHandleForReading.readDataToEndOfFile()
let stderr = String(data: stderrData, encoding:.utf8)?? ""
return (stdout, stderr)
}```swift
// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String]) -> (String, String) {
let process = Process()
process.launchPath = binary
process.arguments = arguments
let stdoutPipe = Pipe()
process.standardOutput = stdoutPipe
let stderrPipe = Pipe()
process.standardError = stderrPipe
process.launch()
let stdoutData = stdoutPipe.fileHandleForReading.readDataToEndOfFile()
let stdout = String(data: stdoutData, encoding:.utf8)?? ""
let stderrData = stderrPipe.fileHandleForReading.readDataToEndOfFile()
let stderr = String(data: stderrData, encoding:.utf8)?? ""
return (stdout, stderr)
}
// Execute binary with arguments.
let (stdout, stderr) = execute(binary: "/usr/bin/git", arguments: ["--version"])
print("stdout: \(stdout)")
print("stderr: \(stderr)")
```let stdout = String(data: stdoutData, encoding:.utf8)?? "" // consecutive statements on a line must be separated by ';'let stdout = String(data: stdoutData, encoding:.utf8)?? "" // cannot use optional chaining on non-optional value of type 'String'let stdout = String(data: stdoutData, encoding:.utf8)?? "" // string literal is unusedlet stderr = String(data: stderrData, encoding:.utf8)?? "" // cannot use optional chaining on non-optional value of type 'String'let stderr = String(data: stderrData, encoding:.utf8)?? "" // consecutive statements on a line must be separated by ';'let stderr = String(data: stderrData, encoding:.utf8)?? "" // string literal is unusedfunc execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardOutput = pipe
task.standardError = pipe
task.launch()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding: String.Encoding.utf8)!
return (output, "")
}
func execute(binary: String, arguments: [String]) -> String {
let (output, _) = execute(binary: binary, arguments: arguments)
return output
}
func execute(binary: String, arguments: [String], workingDirectory: String) -> String {
let (output, _) = execute(binary: binary, arguments: arguments, workingDirectory: workingDirectory)
return output
}
func execute(binary: String, arguments: [String], workingDirectory: String) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
task.currentDirectoryPath = workingDirectory
let pipe = Pipe()
task.standardOutput = pipe
task.standardError = pipe
task.launch()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding: String.Encoding.utf8)!
return (output, "")
}
func execute(binary: String, arguments: [String], workingDirectory: String, environment: [String: String]) -> String {
let (output, _) = execute(binary: binary, arguments: arguments, workingDirectory: workingDirectory, environment: environment)
return output
}
func execute(binary: String, arguments: [String], workingDirectory: String, environment: [String: String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
task.currentDirectoryPath = workingDirectory
task.environment = environment
let pipe = Pipe()
task.standardOutput = pipe
task.standardError = pipe
task.launch()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding: String.Encoding.utf8)!
return (output, "")
}
func execute(binary: String, arguments: [String], workingDirectory: String, environment: [String: String], timeout: TimeInterval) -> String {
let (output, _) = execute(binary: binary, arguments: arguments, workingDirectory: workingDirectory, environment: environment, timeout: timeout)
return output
}
func execute(binary: String, arguments: [String], workingDirectory: String, environment: [String: String], timeout: TimeInterval) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
task.currentDirectoryPath = workingDirectory
task.environment = environment
let pipe = Pipe()
task.standardOutput = pipe
task.standardError = pipe
task.launch()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding: String.Encoding.utf8)!
let wait = task.waitUntilExit(timeout: timeout)
if wait ==.timedOut {
task.terminate()
}
return (output, "")
}
func execute(binary: String, arguments: [String], workingDirectory: String, environment: [String: String], timeout: TimeInterval, timeoutHandler: @escaping () -> Void) -> String {
let (output, _) = execute(binary: binary, arguments: arguments, workingDirectory: workingDirectory, environment: environment, timeout: timeout, timeoutHandler: timeoutHandler)
return output
}```swift
// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardOutput = pipe
task.standardError = pipe
task.launch()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding: String.Encoding.utf8)!
return (output, "")
}
// Function to execute binary with arguments and return stdout.
func execute(binary: String, arguments: [String]) -> String {
let (output, _) = execute(binary: binary, arguments: arguments)
return output
}
// Function to execute binary with arguments and return stdout.
func execute(binary: String, arguments: [String], workingDirectory: String) -> String {
let (output, _) = execute(binary: binary, arguments: arguments, workingDirectory: workingDirectory)
return output
}
// Function to execute binary with arguments and return stdout.
func execute(binary: String, arguments: [String], workingDirectory: String) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
task.currentDirectoryPath = workingDirectory
let pipe = Pipe()
task.standardOutput = pipe
task.standardError = pipe
task.launch()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding: String.Encoding.utf8)!
return (output, "")
}
// Function to execute binary with arguments and return stdout.
func execute(binary: String, arguments: [String], workingDirectory: String, environment: [String: String]) -> String {
let (output, _) = execute(binary: binary, arguments: arguments, workingDirectory: workingDirectory, environment: environment)
return output
}
// Function to execute binary with arguments and return stdout.
func execute(binary: String, arguments: [String], workingDirectory: String, environment: [String: String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
task.currentDirectoryPath = workingDirectory
task.environment = environment
let pipe = Pipe()
task.standardOutput = pipe
task.standardError = pipe
task.launch()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding: String.Encoding.utf8)!
return (output, "")
}
// Function to execute binary with arguments and return stdout.
func execute(binary: String, arguments: [String], workingDirectory: String, environment: [String: String], timeout: TimeInterval) -> String {
let (output, _) = execute(binary: binary, arguments: arguments, workingDirectory: workingDirectory, environment: environment, timeout: timeout)
return output
}
// Function to execute binary with arguments and return stdout.
func execute(binary: String, arguments: [String], workingDirectory: String, environment: [String: String], timeout: TimeInterval) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
task.currentDirectoryPath = workingDirectory
task.environment = environment
let pipe = Pipe()
task.standardOutput = pipe
task.standardError = pipe
task.launch()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding: String.Encoding.utf8)!
let wait = task.waitUntilExit(timeout: timeout)
if wait ==.timedOut {
task.terminate()
}
return (output, "")
}
// Function to execute binary with arguments and return stdout.
func execute(binary: String, arguments: [String], workingDirectory: String, environment: [String: String], timeout: TimeInterval, timeoutHandler: @escaping () -> Void) -> String {
let (output, _) = execute(binary: binary, arguments: arguments, workingDirectory: workingDirectory, environment: environment, timeout: timeout, timeoutHandler: timeoutHandler)
return output
}
// Function to execute binary with arguments and return stdout.
func execute(binary: String, arguments: [String], workingDirectory: String, environment: [String: String], timeout: TimeInterval, timeoutHandler: @escaping () -> Void) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
task.currentDirectoryPath = workingDirectory
task.environment = environment
let pipe = Pipe()
task.standardOutput = pipe
task.let wait = task.waitUntilExit(timeout: timeout) // argument passed to call that takes no argumentsif wait ==.timedOut { // expected '{' after 'if' conditionlet (output, _) = execute(binary: binary, arguments: arguments, workingDirectory: workingDirectory, environment: environment, timeout: timeout, timeoutHandler: timeoutHandler) // cannot convert value of type 'String' to specified type '(_, _)'func execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardOutput = pipe
let errorPipe = Pipe()
task.standardError = errorPipe
task.launch()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding: String.Encoding.utf8)?? ""
let errorData = errorPipe.fileHandleForReading.readDataToEndOfFile()
let error = String(data: errorData, encoding: String.Encoding.utf8)?? ""
return (output, error)
}```swift
// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardOutput = pipe
let errorPipe = Pipe()
task.standardError = errorPipe
task.launch()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding: String.Encoding.utf8)?? ""
let errorData = errorPipe.fileHandleForReading.readDataToEndOfFile()
let error = String(data: errorData, encoding: String.Encoding.utf8)?? ""
return (output, error)
}
```let output = String(data: data, encoding: String.Encoding.utf8)?? "" // consecutive statements on a line must be separated by ';'let output = String(data: data, encoding: String.Encoding.utf8)?? "" // cannot use optional chaining on non-optional value of type 'String'let output = String(data: data, encoding: String.Encoding.utf8)?? "" // string literal is unusedlet error = String(data: errorData, encoding: String.Encoding.utf8)?? "" // consecutive statements on a line must be separated by ';'let error = String(data: errorData, encoding: String.Encoding.utf8)?? "" // string literal is unusedlet error = String(data: errorData, encoding: String.Encoding.utf8)?? "" // cannot use optional chaining on non-optional value of type 'String'func execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardOutput = pipe
let errorPipe = Pipe()
task.standardError = errorPipe
task.launch()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding:.utf8)?? ""
let errorData = errorPipe.fileHandleForReading.readDataToEndOfFile()
let error = String(data: errorData, encoding:.utf8)?? ""
return (output, error)
}```swift
// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardOutput = pipe
let errorPipe = Pipe()
task.standardError = errorPipe
task.launch()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding:.utf8)?? ""
let errorData = errorPipe.fileHandleForReading.readDataToEndOfFile()
let error = String(data: errorData, encoding:.utf8)?? ""
return (output, error)
}
```let output = String(data: data, encoding:.utf8)?? "" // cannot use optional chaining on non-optional value of type 'String'let output = String(data: data, encoding:.utf8)?? "" // string literal is unusedlet output = String(data: data, encoding:.utf8)?? "" // consecutive statements on a line must be separated by ';'let error = String(data: errorData, encoding:.utf8)?? "" // string literal is unusedlet error = String(data: errorData, encoding:.utf8)?? "" // cannot use optional chaining on non-optional value of type 'String'let error = String(data: errorData, encoding:.utf8)?? "" // consecutive statements on a line must be separated by ';'func execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardOutput = pipe
let errorPipe = Pipe()
task.standardError = errorPipe
task.launch()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding: String.Encoding.utf8)
let errorData = errorPipe.fileHandleForReading.readDataToEndOfFile()
let error = String(data: errorData, encoding: String.Encoding.utf8)
return (output?? "", error?? "")
}```swift
// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardOutput = pipe
let errorPipe = Pipe()
task.standardError = errorPipe
task.launch()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding: String.Encoding.utf8)
let errorData = errorPipe.fileHandleForReading.readDataToEndOfFile()
let error = String(data: errorData, encoding: String.Encoding.utf8)
return (output?? "", error?? "")
}
```return (output?? "", error?? "") // cannot convert return expression of type '(String?, String, String?)' to return type '(String, String)'return (output?? "", error?? "") // cannot use optional chaining on non-optional value of type 'String'return (output?? "", error?? "") // expected ',' separatorreturn (output?? "", error?? "") // cannot use optional chaining on non-optional value of type 'String'func execute(binary: String, arguments: [String]) -> (String, String) {
let process = Process()
process.launchPath = binary
process.arguments = arguments
let pipe = Pipe()
process.standardOutput = pipe
let errorPipe = Pipe()
process.standardError = errorPipe
process.launch()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding: String.Encoding.utf8)
let errorData = errorPipe.fileHandleForReading.readDataToEndOfFile()
let error = String(data: errorData, encoding: String.Encoding.utf8)
return (output?? "", error?? "")
}```swift
// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String]) -> (String, String) {
let process = Process()
process.launchPath = binary
process.arguments = arguments
let pipe = Pipe()
process.standardOutput = pipe
let errorPipe = Pipe()
process.standardError = errorPipe
process.launch()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding: String.Encoding.utf8)
let errorData = errorPipe.fileHandleForReading.readDataToEndOfFile()
let error = String(data: errorData, encoding: String.Encoding.utf8)
return (output?? "", error?? "")
}
```return (output?? "", error?? "") // cannot convert return expression of type '(String?, String, String?)' to return type '(String, String)'return (output?? "", error?? "") // cannot use optional chaining on non-optional value of type 'String'return (output?? "", error?? "") // expected ',' separatorreturn (output?? "", error?? "") // cannot use optional chaining on non-optional value of type 'String'func execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let stdoutPipe = Pipe()
let stderrPipe = Pipe()
task.standardOutput = stdoutPipe
task.standardError = stderrPipe
task.launch()
let stdoutData = stdoutPipe.fileHandleForReading.readDataToEndOfFile()
let stderrData = stderrPipe.fileHandleForReading.readDataToEndOfFile()
let stdout = String(data: stdoutData, encoding: String.Encoding.utf8)?? ""
let stderr = String(data: stderrData, encoding: String.Encoding.utf8)?? ""
return (stdout, stderr)
}```swift
// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let stdoutPipe = Pipe()
let stderrPipe = Pipe()
task.standardOutput = stdoutPipe
task.standardError = stderrPipe
task.launch()
let stdoutData = stdoutPipe.fileHandleForReading.readDataToEndOfFile()
let stderrData = stderrPipe.fileHandleForReading.readDataToEndOfFile()
let stdout = String(data: stdoutData, encoding: String.Encoding.utf8)?? ""
let stderr = String(data: stderrData, encoding: String.Encoding.utf8)?? ""
return (stdout, stderr)
}
```let stdout = String(data: stdoutData, encoding: String.Encoding.utf8)?? "" // cannot use optional chaining on non-optional value of type 'String'let stdout = String(data: stdoutData, encoding: String.Encoding.utf8)?? "" // consecutive statements on a line must be separated by ';'let stdout = String(data: stdoutData, encoding: String.Encoding.utf8)?? "" // string literal is unusedlet stderr = String(data: stderrData, encoding: String.Encoding.utf8)?? "" // consecutive statements on a line must be separated by ';'let stderr = String(data: stderrData, encoding: String.Encoding.utf8)?? "" // cannot use optional chaining on non-optional value of type 'String'let stderr = String(data: stderrData, encoding: String.Encoding.utf8)?? "" // string literal is unusedfunc execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let stdoutPipe = Pipe()
task.standardOutput = stdoutPipe
let stderrPipe = Pipe()
task.standardError = stderrPipe
task.launch()
let stdoutData = stdoutPipe.fileHandleForReading.readDataToEndOfFile()
let stderrData = stderrPipe.fileHandleForReading.readDataToEndOfFile()
let stdoutString = String(data: stdoutData, encoding:.utf8)?? ""
let stderrString = String(data: stderrData, encoding:.utf8)?? ""
return (stdoutString, stderrString)
}```swift
// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let stdoutPipe = Pipe()
task.standardOutput = stdoutPipe
let stderrPipe = Pipe()
task.standardError = stderrPipe
task.launch()
let stdoutData = stdoutPipe.fileHandleForReading.readDataToEndOfFile()
let stderrData = stderrPipe.fileHandleForReading.readDataToEndOfFile()
let stdoutString = String(data: stdoutData, encoding:.utf8)?? ""
let stderrString = String(data: stderrData, encoding:.utf8)?? ""
return (stdoutString, stderrString)
}
```let stdoutString = String(data: stdoutData, encoding:.utf8)?? "" // consecutive statements on a line must be separated by ';'let stdoutString = String(data: stdoutData, encoding:.utf8)?? "" // string literal is unusedlet stdoutString = String(data: stdoutData, encoding:.utf8)?? "" // cannot use optional chaining on non-optional value of type 'String'let stderrString = String(data: stderrData, encoding:.utf8)?? "" // cannot use optional chaining on non-optional value of type 'String'let stderrString = String(data: stderrData, encoding:.utf8)?? "" // string literal is unusedlet stderrString = String(data: stderrData, encoding:.utf8)?? "" // consecutive statements on a line must be separated by ';'func execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardOutput = pipe
let errorPipe = Pipe()
task.standardError = errorPipe
task.launch()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding: String.Encoding.utf8)?? ""
let errorData = errorPipe.fileHandleForReading.readDataToEndOfFile()
let error = String(data: errorData, encoding: String.Encoding.utf8)?? ""
return (output, error)
}```swift
// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String]) -> (String, String) {
let task = Process()
task.launchPath = binary
task.arguments = arguments
let pipe = Pipe()
task.standardOutput = pipe
let errorPipe = Pipe()
task.standardError = errorPipe
task.launch()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output = String(data: data, encoding: String.Encoding.utf8)?? ""
let errorData = errorPipe.fileHandleForReading.readDataToEndOfFile()
let error = String(data: errorData, encoding: String.Encoding.utf8)?? ""
return (output, error)
}
```let output = String(data: data, encoding: String.Encoding.utf8)?? "" // consecutive statements on a line must be separated by ';'let output = String(data: data, encoding: String.Encoding.utf8)?? "" // cannot use optional chaining on non-optional value of type 'String'let output = String(data: data, encoding: String.Encoding.utf8)?? "" // string literal is unusedlet error = String(data: errorData, encoding: String.Encoding.utf8)?? "" // consecutive statements on a line must be separated by ';'let error = String(data: errorData, encoding: String.Encoding.utf8)?? "" // string literal is unusedlet error = String(data: errorData, encoding: String.Encoding.utf8)?? "" // cannot use optional chaining on non-optional value of type 'String'func execute(binary: String, arguments: [String]) -> (String, String) {
let process = Process()
process.launchPath = binary
process.arguments = arguments
let stdoutPipe = Pipe()
let stderrPipe = Pipe()
process.standardOutput = stdoutPipe
process.standardError = stderrPipe
process.launch()
let stdoutData = stdoutPipe.fileHandleForReading.readDataToEndOfFile()
let stderrData = stderrPipe.fileHandleForReading.readDataToEndOfFile()
let stdoutString = String(data: stdoutData, encoding: String.Encoding.utf8)
let stderrString = String(data: stderrData, encoding: String.Encoding.utf8)
return (stdoutString!, stderrString!)
}```swift
// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String]) -> (String, String) {
let process = Process()
process.launchPath = binary
process.arguments = arguments
let stdoutPipe = Pipe()
let stderrPipe = Pipe()
process.standardOutput = stdoutPipe
process.standardError = stderrPipe
process.launch()
let stdoutData = stdoutPipe.fileHandleForReading.readDataToEndOfFile()
let stderrData = stderrPipe.fileHandleForReading.readDataToEndOfFile()
let stdoutString = String(data: stdoutData, encoding: String.Encoding.utf8)
let stderrString = String(data: stderrData, encoding: String.Encoding.utf8)
return (stdoutString!, stderrString!)
}
```func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return { argument in
if let cached = cache[argument] {
return cached
}
let result = function(argument)
cache[argument] = result
return result
}
}```swift
// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return { argument in
if let cached = cache[argument] {
return cached
}
let result = function(argument)
cache[argument] = result
return result
}
}
```func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return { x in
if let cached = cache[x] {
return cached
}
let result = function(x)
cache[x] = result
return result
}
}```swift
// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return { x in
if let cached = cache[x] {
return cached
}
let result = function(x)
cache[x] = result
return result
}
}
```func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return { arg in
if let cached = cache[arg] {
return cached
}
let result = function(arg)
cache[arg] = result
return result
}
}```swift
// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return { arg in
if let cached = cache[arg] {
return cached
}
let result = function(arg)
cache[arg] = result
return result
}
}
// A memoized version of fibonacci.
let fibonacci = memoize { n in
if n < 2 {
return n
}
return fibonacci(n - 1) + fibonacci(n - 2)
}
// Prints "1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610, 987, 1597, 2584, 4181, 6765, 10946, 17711, 28657, 46368, 75025, 121393, 196418, 317811, 514229, 832040, 1346269, 2178309, 3524578, 5702887, 9227465, 14930352, 24157817, 39088169, 63245986, 102334155, 165580141, 267914296, 433494437, 701408733, 1134903170, 1836311903, 2971215073, 4807526976, 7778742049, 12586269025, 20365011074, 32951280099, 53316291173, 86267571272, 139583862445, 225851433717, 365435296162, 591286729879, 956722026041, 1548008755920, 2504730781961, 4052739537881, 6557470319842, 10610209857723, 17167680177565, 27777890035288, 44945570212853, 72723460248141, 117669030460994, 190392490709135, 308061521170129, 498454011879264, 806515533049393, 1304969544928657, 2111485077978050, 3416454622906707, 5527939700884757, 8944394323791464, 14472334024676221, 23416728348467685, 37889062373143906, 61305790721611591, 99194853094755497, 1605006func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return {
if let cached = cache[$0] {
return cached
}
let result = function($0)
cache[$0] = result
return result
}
}```swift
// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return {
if let cached = cache[$0] {
return cached
}
let result = function($0)
cache[$0] = result
return result
}
}
// Usage example.
let fibonacci = memoize { n in
guard n > 1 else { return n }
return fibonacci(n - 1) + fibonacci(n - 2)
}
fibonacci(10) // 55
```func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return {
if let cached = cache[$0] {
return cached
}
let result = function($0)
cache[$0] = result
return result
}
}```swift
// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return {
if let cached = cache[$0] {
return cached
}
let result = function($0)
cache[$0] = result
return result
}
}
```func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return { arg in
if let cached = cache[arg] {
return cached
}
let result = function(arg)
cache[arg] = result
return result
}
}```swift
// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return { arg in
if let cached = cache[arg] {
return cached
}
let result = function(arg)
cache[arg] = result
return result
}
}
```func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return {
if let cached = cache[$0] {
return cached
}
let result = function($0)
cache[$0] = result
return result
}
}```swift
// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return {
if let cached = cache[$0] {
return cached
}
let result = function($0)
cache[$0] = result
return result
}
}
// Usage example.
let fibonacci = memoize { n in
guard n > 1 else { return n }
return fibonacci(n - 1) + fibonacci(n - 2)
}
fibonacci(10) // 55
```func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return { x in
if let result = cache[x] {
return result
} else {
let result = function(x)
cache[x] = result
return result
}
}
}```swift
// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return { x in
if let result = cache[x] {
return result
} else {
let result = function(x)
cache[x] = result
return result
}
}
}
// Memoized factorial function.
let factorial = memoize { n in
guard n > 1 else { return 1 }
return n * factorial(n - 1)
}
// Prints "120".
print(factorial(5))
// Prints "120".
print(factorial(5))
```func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return {
if let cached = cache[$0] {
return cached
}
let result = function($0)
cache[$0] = result
return result
}
}```swift
// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return {
if let cached = cache[$0] {
return cached
}
let result = function($0)
cache[$0] = result
return result
}
}
// A memoized version of the factorial function.
let factorial = memoize { n in
guard n > 1 else { return 1 }
return n * factorial(n - 1)
}
factorial(5) // 120
factorial(5) // 120
factorial(5) // 120
```func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return { x in
if let result = cache[x] {
return result
}
let result = function(x)
cache[x] = result
return result
}
}```swift
// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
var cache = [T: U]()
return { x in
if let result = cache[x] {
return result
}
let result = function(x)
cache[x] = result
return result
}
}
// A memoized version of the fibonacci function.
let fibonacci = memoize { n in
guard n > 1 else { return n }
return fibonacci(n - 1) + fibonacci(n - 2)
}
// Prints "1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610, 987, 1597, 2584, 4181, 6765, 10946, 17711, 28657, 46368, 75025, 121393, 196418, 317811, 514229, 832040, 1346269, 2178309, 3524578, 5702887, 9227465, 14930352, 24157817, 39088169, 63245986, 102334155, 165580141, 267914296, 433494437, 701408733, 1134903170, 1836311903, 2971215073, 4807526976, 7778742049, 12586269025, 20365011074, 32951280099, 53316291173, 86267571272, 139583862445, 225851433717, 365435296162, 591286729879, 956722026041, 1548008755920, 2504730781961, 4052739537881, 6557470319842, 10610209857723, 17167680177565, 27777890035288, 44945570212853, 72723460248141, 117669030460994, 190392490709135, 308061521170129, 498454011879264, 806515533049393, 1304969544928657, 2111485077978050, 3416454622906707, 5527939700884757, 8944394323791464, 14472334024676221, 23416728348467685, 37889062373143906, 61305790721611591, 99194853094755497, 160500func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var result: T?
var error: Error?
for _ in 0..<attempts {
do {
result = try task()
break
} catch {
error = error
}
}
if let result = result {
return result
} else {
throw error!
}
}```swift
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var result: T?
var error: Error?
for _ in 0..<attempts {
do {
result = try task()
break
} catch {
error = error
}
}
if let result = result {
return result
} else {
throw error!
}
}
```error = error // cannot assign to value: 'error' is immutablefunc retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var attempt = 0
while true {
do {
return try task()
} catch {
attempt += 1
if attempt >= attempts {
throw error
}
}
}
}```swift
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var attempt = 0
while true {
do {
return try task()
} catch {
attempt += 1
if attempt >= attempts {
throw error
}
}
}
}
```func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var attempts = attempts
while attempts > 0 {
do {
return try task()
} catch {
attempts -= 1
}
}
throw error
}```swift
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var attempts = attempts
while attempts > 0 {
do {
return try task()
} catch {
attempts -= 1
}
}
throw error
}
```throw error // thrown expression type '(String) -> ()' does not conform to 'Error'throw error // expansion of macro 'error' requires leading '#'func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var attempt = 0
while true {
do {
return try task()
} catch {
attempt += 1
if attempt >= attempts {
throw error
}
}
}
}```swift
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var attempt = 0
while true {
do {
return try task()
} catch {
attempt += 1
if attempt >= attempts {
throw error
}
}
}
}
```func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var attempt = 0
while true {
do {
return try task()
} catch {
attempt += 1
if attempt >= attempts {
throw error
}
}
}
}```swift
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var attempt = 0
while true {
do {
return try task()
} catch {
attempt += 1
if attempt >= attempts {
throw error
}
}
}
}
```func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var error: Error?
for _ in 0..<attempts {
do {
return try task()
} catch let e {
error = e
}
}
throw error!
}```swift
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var error: Error?
for _ in 0..<attempts {
do {
return try task()
} catch let e {
error = e
}
}
throw error!
}
```func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var error: Error?
for _ in 0..<attempts {
do {
return try task()
} catch let e {
error = e
}
}
throw error!
}```swift
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var error: Error?
for _ in 0..<attempts {
do {
return try task()
} catch let e {
error = e
}
}
throw error!
}
```func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var attempt = 1
while true {
do {
return try task()
} catch {
if attempt >= attempts {
throw error
}
attempt += 1
}
}
}```swift
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var attempt = 1
while true {
do {
return try task()
} catch {
if attempt >= attempts {
throw error
}
attempt += 1
}
}
}
```func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var attempts = attempts
while attempts > 0 {
do {
return try task()
} catch {
attempts -= 1
}
}
throw error
}```swift
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var attempts = attempts
while attempts > 0 {
do {
return try task()
} catch {
attempts -= 1
}
}
throw error
}
```throw error // thrown expression type '(String) -> ()' does not conform to 'Error'throw error // expansion of macro 'error' requires leading '#'func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var attempt = 0
while true {
do {
return try task()
} catch {
attempt += 1
if attempt >= attempts {
throw error
}
}
}
}```swift
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
var attempt = 0
while true {
do {
return try task()
} catch {
attempt += 1
if attempt >= attempts {
throw error
}
}
}
}
```protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer: DIContainerProtocol {
private var factories: [ObjectIdentifier: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
factories[ObjectIdentifier(T.self)] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
factories[ObjectIdentifier(T.self)]?() as? T
}
}
extension DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
self.register(type, factory: factory)
}
func resolve<T>(_ type: T.Type) -> T? {
self.resolve(type)
}
}```swift
protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
// Simple dependency injection (DI) container.
class DIContainer: DIContainerProtocol {
private var factories: [ObjectIdentifier: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
factories[ObjectIdentifier(T.self)] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
factories[ObjectIdentifier(T.self)]?() as? T
}
}
// MARK: - DIContainerProtocol
extension DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
self.register(type, factory: factory)
}
func resolve<T>(_ type: T.Type) -> T? {
self.resolve(type)
}
}
```protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer: DIContainerProtocol {
private var factories: [ObjectIdentifier: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
factories[ObjectIdentifier(T.self)] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
guard let factory = factories[ObjectIdentifier(T.self)] else {
return nil
}
return factory() as? T
}
}```swift
protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
// Simple dependency injection (DI) container.
class DIContainer: DIContainerProtocol {
private var factories: [ObjectIdentifier: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
factories[ObjectIdentifier(T.self)] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
guard let factory = factories[ObjectIdentifier(T.self)] else {
return nil
}
return factory() as? T
}
}
```protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer: DIContainerProtocol {
private var factories: [String: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
factories[String(describing: type)] = { factory() }
}
func resolve<T>(_ type: T.Type) -> T? {
guard let factory = factories[String(describing: type)] else {
return nil
}
return factory() as? T
}
}```swift
protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
// Simple dependency injection (DI) container.
class DIContainer: DIContainerProtocol {
private var factories: [String: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
factories[String(describing: type)] = { factory() }
}
func resolve<T>(_ type: T.Type) -> T? {
guard let factory = factories[String(describing: type)] else {
return nil
}
return factory() as? T
}
}
```protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer: DIContainerProtocol {
private var factories: [ObjectIdentifier: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
factories[ObjectIdentifier(T.self)] = { factory() }
}
func resolve<T>(_ type: T.Type) -> T? {
factories[ObjectIdentifier(T.self)]?() as? T
}
}```swift
protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
// Simple dependency injection (DI) container.
class DIContainer: DIContainerProtocol {
private var factories: [ObjectIdentifier: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
factories[ObjectIdentifier(T.self)] = { factory() }
}
func resolve<T>(_ type: T.Type) -> T? {
factories[ObjectIdentifier(T.self)]?() as? T
}
}
```protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer: DIContainerProtocol {
private var factories: [ObjectIdentifier: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
factories[ObjectIdentifier(T.self)] = { factory() }
}
func resolve<T>(_ type: T.Type) -> T? {
factories[ObjectIdentifier(T.self)]?() as? T
}
}```swift
protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
// Simple dependency injection (DI) container.
class DIContainer: DIContainerProtocol {
private var factories: [ObjectIdentifier: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
factories[ObjectIdentifier(T.self)] = { factory() }
}
func resolve<T>(_ type: T.Type) -> T? {
factories[ObjectIdentifier(T.self)]?() as? T
}
}
```protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer: DIContainerProtocol {
private var factories: [ObjectIdentifier: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
factories[ObjectIdentifier(T.self)] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
factories[ObjectIdentifier(T.self)]?() as? T
}
}```swift
protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
// Simple dependency injection (DI) container.
class DIContainer: DIContainerProtocol {
private var factories: [ObjectIdentifier: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
factories[ObjectIdentifier(T.self)] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
factories[ObjectIdentifier(T.self)]?() as? T
}
}
```protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer: DIContainerProtocol {
private var factories: [String: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
factories[String(describing: type)] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
guard let factory = factories[String(describing: type)] else { return nil }
return factory() as? T
}
}```swift
protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
// Simple dependency injection (DI) container.
class DIContainer: DIContainerProtocol {
private var factories: [String: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
factories[String(describing: type)] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
guard let factory = factories[String(describing: type)] else { return nil }
return factory() as? T
}
}
```protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer: DIContainerProtocol {
private var factories: [ObjectIdentifier: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
factories[ObjectIdentifier(T.self)] = { factory() }
}
func resolve<T>(_ type: T.Type) -> T? {
guard let factory = factories[ObjectIdentifier(T.self)] else { return nil }
return factory() as? T
}
}```swift
protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
// Simple dependency injection (DI) container.
class DIContainer: DIContainerProtocol {
private var factories: [ObjectIdentifier: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
factories[ObjectIdentifier(T.self)] = { factory() }
}
func resolve<T>(_ type: T.Type) -> T? {
guard let factory = factories[ObjectIdentifier(T.self)] else { return nil }
return factory() as? T
}
}
```protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer: DIContainerProtocol {
private var factories: [ObjectIdentifier: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
factories[ObjectIdentifier(T.self)] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
guard let factory = factories[ObjectIdentifier(T.self)] else {
return nil
}
return factory() as? T
}
}
class DIContainer {
private var factories: [ObjectIdentifier: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
factories[ObjectIdentifier(T.self)] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
guard let factory = factories[ObjectIdentifier(T.self)] else {
return nil
}
return factory() as? T
}
}```swift
protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
// Simple dependency injection (DI) container.
class DIContainer: DIContainerProtocol {
private var factories: [ObjectIdentifier: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
factories[ObjectIdentifier(T.self)] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
guard let factory = factories[ObjectIdentifier(T.self)] else {
return nil
}
return factory() as? T
}
}
// Dependency injection container with a type-safe API.
class DIContainer {
private var factories: [ObjectIdentifier: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
factories[ObjectIdentifier(T.self)] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
guard let factory = factories[ObjectIdentifier(T.self)] else {
return nil
}
return factory() as? T
}
}
```class DIContainer { // invalid redeclaration of 'DIContainer'protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
class DIContainer: DIContainerProtocol {
private var factories: [ObjectIdentifier: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
factories[ObjectIdentifier(T.self)] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
guard let factory = factories[ObjectIdentifier(T.self)] else {
return nil
}
return factory() as? T
}
}```swift
protocol DIContainerProtocol {
func register<T>(_ type: T.Type, factory: @escaping () -> T)
func resolve<T>(_ type: T.Type) -> T?
}
// Simple dependency injection (DI) container.
class DIContainer: DIContainerProtocol {
private var factories: [ObjectIdentifier: () -> Any] = [:]
func register<T>(_ type: T.Type, factory: @escaping () -> T) {
factories[ObjectIdentifier(T.self)] = factory
}
func resolve<T>(_ type: T.Type) -> T? {
guard let factory = factories[ObjectIdentifier(T.self)] else {
return nil
}
return factory() as? T
}
}
```protocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
typealias Transition = (from: State, to: State, event: Event)
var state: State
var transitions: [Transition] = []
init(state: State) {
self.state = state
}
func trigger(event: Event) {
let transition = transitions.first { $0.from == state && $0.event == event }
if let transition = transition {
state = transition.to
}
}
func registerTransition(from: State, to: State, event: Event) {
transitions.append((from: from, to: to, event: event))
}
}```swift
protocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
// Finite state machine with possibility to register custom transitions between states.
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
typealias Transition = (from: State, to: State, event: Event)
var state: State
var transitions: [Transition] = []
init(state: State) {
self.state = state
}
func trigger(event: Event) {
let transition = transitions.first { $0.from == state && $0.event == event }
if let transition = transition {
state = transition.to
}
}
func registerTransition(from: State, to: State, event: Event) {
transitions.append((from: from, to: to, event: event))
}
}
```init(state: State) { // initializer requirement 'init(state:)' can only be satisfied by a 'required' initializer in non-final class 'StateMachine<State, Event>'protocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
typealias Transition = (from: State, to: State, event: Event)
private var transitions: [Transition] = []
private var state: State
required init(state: State) {
self.state = state
}
func trigger(event: Event) {
let transition = transitions.first { $0.from == state && $0.event == event }
if let transition = transition {
state = transition.to
}
}
func registerTransition(from: State, to: State, event: Event) {
transitions.append((from: from, to: to, event: event))
}
}```swift
protocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
// Finite state machine with possibility to register custom transitions between states.
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
typealias Transition = (from: State, to: State, event: Event)
private var transitions: [Transition] = []
private var state: State
required init(state: State) {
self.state = state
}
func trigger(event: Event) {
let transition = transitions.first { $0.from == state && $0.event == event }
if let transition = transition {
state = transition.to
}
}
func registerTransition(from: State, to: State, event: Event) {
transitions.append((from: from, to: to, event: event))
}
}
```private var state: State // property 'state' must be declared internal because it matches a requirement in internal protocol 'StateMachineProtocol'protocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
typealias Transition = (from: State, to: State, event: Event)
private var transitions: [Transition] = []
private var state: State
required init(state: State) {
self.state = state
}
func trigger(event: Event) {
let transition = transitions.first { $0.event == event && $0.from == state }
if let transition = transition {
state = transition.to
}
}
func registerTransition(from: State, to: State, event: Event) {
transitions.append((from: from, to: to, event: event))
}
}```swift
protocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
// Finite state machine with possibility to register custom transitions between states.
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
typealias Transition = (from: State, to: State, event: Event)
private var transitions: [Transition] = []
private var state: State
required init(state: State) {
self.state = state
}
func trigger(event: Event) {
let transition = transitions.first { $0.event == event && $0.from == state }
if let transition = transition {
state = transition.to
}
}
func registerTransition(from: State, to: State, event: Event) {
transitions.append((from: from, to: to, event: event))
}
}
```private var state: State // property 'state' must be declared internal because it matches a requirement in internal protocol 'StateMachineProtocol'protocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
var state: State
var transitions: [State: [Event: State]] = [:]
init(state: State) {
self.state = state
}
func trigger(event: Event) {
guard let nextState = transitions[state]?[event] else {
return
}
state = nextState
}
func registerTransition(from: State, to: State, event: Event) {
transitions[from, default: [:]][event] = to
}
}```swift
protocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
// Finite state machine with possibility to register custom transitions between states.
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
var state: State
var transitions: [State: [Event: State]] = [:]
init(state: State) {
self.state = state
}
func trigger(event: Event) {
guard let nextState = transitions[state]?[event] else {
return
}
state = nextState
}
func registerTransition(from: State, to: State, event: Event) {
transitions[from, default: [:]][event] = to
}
}
```init(state: State) { // initializer requirement 'init(state:)' can only be satisfied by a 'required' initializer in non-final class 'StateMachine<State, Event>'protocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
var state: State
var transitions: [State: [Event: State]] = [:]
init(state: State) {
self.state = state
}
func trigger(event: Event) {
guard let nextState = transitions[state]?[event] else {
return
}
state = nextState
}
func registerTransition(from: State, to: State, event: Event) {
transitions[from, default: [:]][event] = to
}
}```swift
protocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
// Finite state machine with possibility to register custom transitions between states.
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
var state: State
var transitions: [State: [Event: State]] = [:]
init(state: State) {
self.state = state
}
func trigger(event: Event) {
guard let nextState = transitions[state]?[event] else {
return
}
state = nextState
}
func registerTransition(from: State, to: State, event: Event) {
transitions[from, default: [:]][event] = to
}
}
// Finite state machine with possibility to register custom transitions between states.
// This version is a little bit more verbose, but allows to specify the type of the state machine.
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
var state: State
var transitions: [State: [Event: State]] = [:]
init(state: State) {
self.state = state
}
func trigger(event: Event) {
guard let nextState = transitions[state]?[event] else {
return
}
state = nextState
}
func registerTransition(from: State, to: State, event: Event) {
transitions[from, default: [:]][event] = to
}
}
```init(state: State) { // initializer requirement 'init(state:)' can only be satisfied by a 'required' initializer in non-final class 'StateMachine<State, Event>'protocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
typealias Transition = (from: State, to: State, event: Event)
private var transitions: [Transition] = []
private var state: State
init(state: State) {
self.state = state
}
func trigger(event: Event) {
let transition = transitions.first { $0.from == state && $0.event == event }
if let transition = transition {
state = transition.to
}
}
func registerTransition(from: State, to: State, event: Event) {
transitions.append((from: from, to: to, event: event))
}
}```swift
protocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
// Finite state machine with possibility to register custom transitions between states.
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
typealias Transition = (from: State, to: State, event: Event)
private var transitions: [Transition] = []
private var state: State
init(state: State) {
self.state = state
}
func trigger(event: Event) {
let transition = transitions.first { $0.from == state && $0.event == event }
if let transition = transition {
state = transition.to
}
}
func registerTransition(from: State, to: State, event: Event) {
transitions.append((from: from, to: to, event: event))
}
}
```private var state: State // property 'state' must be declared internal because it matches a requirement in internal protocol 'StateMachineProtocol'init(state: State) { // initializer requirement 'init(state:)' can only be satisfied by a 'required' initializer in non-final class 'StateMachine<State, Event>'protocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
typealias Transition = (from: State, to: State, event: Event)
private var transitions: [Transition] = []
private var state: State
init(state: State) {
self.state = state
}
func trigger(event: Event) {
let transition = transitions.first { $0.from == state && $0.event == event }
if let transition = transition {
state = transition.to
}
}
func registerTransition(from: State, to: State, event: Event) {
transitions.append((from: from, to: to, event: event))
}
}```swift
protocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
// Finite state machine with possibility to register custom transitions between states.
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
typealias Transition = (from: State, to: State, event: Event)
private var transitions: [Transition] = []
private var state: State
init(state: State) {
self.state = state
}
func trigger(event: Event) {
let transition = transitions.first { $0.from == state && $0.event == event }
if let transition = transition {
state = transition.to
}
}
func registerTransition(from: State, to: State, event: Event) {
transitions.append((from: from, to: to, event: event))
}
}
```private var state: State // property 'state' must be declared internal because it matches a requirement in internal protocol 'StateMachineProtocol'init(state: State) { // initializer requirement 'init(state:)' can only be satisfied by a 'required' initializer in non-final class 'StateMachine<State, Event>'protocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
var state: State
var transitions: [State: [Event: State]] = [:]
init(state: State) {
self.state = state
}
func trigger(event: Event) {
guard let nextState = transitions[state]?[event] else {
fatalError("No transition registered for state \(state) and event \(event)")
}
state = nextState
}
func registerTransition(from: State, to: State, event: Event) {
transitions[from, default: [:]][event] = to
}
}```swift
protocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
// Finite state machine with possibility to register custom transitions between states.
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
var state: State
var transitions: [State: [Event: State]] = [:]
init(state: State) {
self.state = state
}
func trigger(event: Event) {
guard let nextState = transitions[state]?[event] else {
fatalError("No transition registered for state \(state) and event \(event)")
}
state = nextState
}
func registerTransition(from: State, to: State, event: Event) {
transitions[from, default: [:]][event] = to
}
}
```init(state: State) { // initializer requirement 'init(state:)' can only be satisfied by a 'required' initializer in non-final class 'StateMachine<State, Event>'protocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
typealias Transition = (from: State, to: State, event: Event)
private var transitions: [Transition] = []
private var state: State
required init(state: State) {
self.state = state
}
func trigger(event: Event) {
let transition = transitions.filter { $0.from == state && $0.event == event }.first
if let transition = transition {
state = transition.to
}
}
func registerTransition(from: State, to: State, event: Event) {
transitions.append((from: from, to: to, event: event))
}
}```swift
protocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
// Finite state machine with possibility to register custom transitions between states.
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
typealias Transition = (from: State, to: State, event: Event)
private var transitions: [Transition] = []
private var state: State
required init(state: State) {
self.state = state
}
func trigger(event: Event) {
let transition = transitions.filter { $0.from == state && $0.event == event }.first
if let transition = transition {
state = transition.to
}
}
func registerTransition(from: State, to: State, event: Event) {
transitions.append((from: from, to: to, event: event))
}
}
```private var state: State // property 'state' must be declared internal because it matches a requirement in internal protocol 'StateMachineProtocol'protocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
typealias Transition = (from: State, to: State, event: Event)
private var transitions: [Transition] = []
private var state: State
required init(state: State) {
self.state = state
}
func trigger(event: Event) {
let transition = transitions.first { $0.event == event && $0.from == state }
guard let transition = transition else { return }
state = transition.to
}
func registerTransition(from: State, to: State, event: Event) {
transitions.append((from: from, to: to, event: event))
}
}```swift
protocol StateMachineProtocol {
associatedtype State: Hashable
associatedtype Event: Hashable
init(state: State)
var state: State { get }
func trigger(event: Event)
func registerTransition(from: State, to: State, event: Event)
}
// Finite state machine with possibility to register custom transitions between states.
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
typealias Transition = (from: State, to: State, event: Event)
private var transitions: [Transition] = []
private var state: State
required init(state: State) {
self.state = state
}
func trigger(event: Event) {
let transition = transitions.first { $0.event == event && $0.from == state }
guard let transition = transition else { return }
state = transition.to
}
func registerTransition(from: State, to: State, event: Event) {
transitions.append((from: from, to: to, event: event))
}
}
```private var state: State // property 'state' must be declared internal because it matches a requirement in internal protocol 'StateMachineProtocol'indirect enum FileSystemNode {
case file(name: String, size: Int)
case directory(name: String, contents: [FileSystemNode])
}
protocol FileSystemInfo {
var totalSize: Int { get }
var filesCount: Int { get }
var treeDepth: Int { get }
}
extension FileSystemNode: FileSystemInfo {
var totalSize: Int {
switch self {
case.file(_, let size):
return size
case.directory(_, let contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case.file:
return 1
case.directory(_, let contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case.file:
return 1
case.directory(_, let contents):
return contents.map { $0.treeDepth }.max()?? 0
}
}
}```swift
indirect enum FileSystemNode {
case file(name: String, size: Int)
case directory(name: String, contents: [FileSystemNode])
}
protocol FileSystemInfo {
var totalSize: Int { get }
var filesCount: Int { get }
var treeDepth: Int { get }
}
// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode: FileSystemInfo {
var totalSize: Int {
switch self {
case.file(_, let size):
return size
case.directory(_, let contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case.file:
return 1
case.directory(_, let contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case.file:
return 1
case.directory(_, let contents):
return contents.map { $0.treeDepth }.max()?? 0
}
}
}
// Example of usage.
let fileSystem: FileSystemNode =.directory(name: "root", contents: [
.file(name: "file1", size: 100),
.file(name: "file2", size: 200),
.directory(name: "dir1", contents: [
.file(name: "file3", size: 300),
.file(name: "file4", size: 400),
.directory(name: "dir2", contents: [
.file(name: "file5", size: 500),
.file(name: "file6", size: 600)
])
])
])
print("Total size: \(fileSystem.totalSize)")
print("Files count: \(fileSystem.filesCount)")
print("Tree depth: \(fileSystem.treeDepth)")
```return contents.map { $0.treeDepth }.max()?? 0 // cannot use optional chaining on non-optional value of type 'Int'return contents.map { $0.treeDepth }.max()?? 0 // value of optional type 'Int?' must be unwrapped to a value of type 'Int'return contents.map { $0.treeDepth }.max()?? 0 // integer literal is unusedreturn contents.map { $0.treeDepth }.max()?? 0 // consecutive statements on a line must be separated by ';'indirect enum FileSystemNode {
case file(name: String, size: Int)
case directory(name: String, contents: [FileSystemNode])
}
protocol FileSystemInfo {
var totalSize: Int { get }
var filesCount: Int { get }
var treeDepth: Int { get }
}
extension FileSystemNode: FileSystemInfo {
var totalSize: Int {
switch self {
case let.file(_, size):
return size
case let.directory(_, contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case.file:
return 1
case let.directory(_, contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case.file:
return 1
case let.directory(_, contents):
return contents.map { $0.treeDepth }.max()?? 0
}
}
}```swift
indirect enum FileSystemNode {
case file(name: String, size: Int)
case directory(name: String, contents: [FileSystemNode])
}
protocol FileSystemInfo {
var totalSize: Int { get }
var filesCount: Int { get }
var treeDepth: Int { get }
}
// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode: FileSystemInfo {
var totalSize: Int {
switch self {
case let.file(_, size):
return size
case let.directory(_, contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case.file:
return 1
case let.directory(_, contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case.file:
return 1
case let.directory(_, contents):
return contents.map { $0.treeDepth }.max()?? 0
}
}
}
// Example of file system tree.
let fileSystemTree: FileSystemNode =.directory(
name: "root",
contents: [
.file(name: "file1", size: 100),
.file(name: "file2", size: 200),
.directory(
name: "dir1",
contents: [
.file(name: "file3", size: 300),
.file(name: "file4", size: 400),
.directory(
name: "dir2",
contents: [
.file(name: "file5", size: 500),
.file(name: "file6", size: 600)
]
)
]
)
]
)
// Example of file system tree.
let fileSystemTree2: FileSystemNode =.directory(
name: "root",
contents: [
.file(name: "file1", size: 100),
.file(name: "file2", size: 200),
.directory(
name: "dir1",
contents: [
.file(name: "file3", size: 300),
.file(name: "file4", size: 400),
.directory(
name: "dir2",
contents: [
.file(name: "file5", size: 500),
.file(name: "file6", size: 600)
]
)
]
)
]
)
// Example of file system tree.
let fileSystemTree3: FileSystemNode =.directory(
name: "root",
contents: [
.file(name: "file1", size: 100),
.file(name: "file2", size: 200),
.directory(
name: "dir1",
contents: [
.file(name: "file3", size: 300),
.file(name: "file4", size: 400),
.directory(
name: "dir2",
contents: [
.file(name: "file5", size: 500),
.file(name: "file6", size: 600)
]
)
]
)
]
)
// Example of file system tree.
let fileSystemTree4: FileSystemNode =.directory(
name: "root",
contents: [
.file(name: "file1", size: 100),
.file(name: "file2", size: 200),
.directory(
name: "dir1",
contents: [
.file(name: "file3", size: 300),
.file(name: "file4", size: 400),
.directory(
name: "dir2",
contents: [
.file(name: "file5", size: 500),
.file(name: "file6", size: 600)
]
)
]
)
]
)
// Example of file system tree.
let fileSystemTree5: FileSystemNode =.directory(
name: "root",
contents: [
.file(name: "file1", size: 100),
.file(name: "file2", size: 200),
.directory(
name: "dir1",
contents: [
.file(name: "file3", size: 300),
.file(name: "file4", size: 400),
.directory(
name: "dir2",
contents: [
.file(name: "file5", size: 500),
.file(name: "file6", size: 600)
]
)return contents.map { $0.treeDepth }.max()?? 0 // cannot use optional chaining on non-optional value of type 'Int'return contents.map { $0.treeDepth }.max()?? 0 // value of optional type 'Int?' must be unwrapped to a value of type 'Int'return contents.map { $0.treeDepth }.max()?? 0 // integer literal is unusedreturn contents.map { $0.treeDepth }.max()?? 0 // consecutive statements on a line must be separated by ';'indirect enum FileSystemNode {
case file(name: String, size: Int)
case directory(name: String, contents: [FileSystemNode])
}
protocol FileSystemInfo {
var totalSize: Int { get }
var filesCount: Int { get }
var treeDepth: Int { get }
}
extension FileSystemNode: FileSystemInfo {
var totalSize: Int {
switch self {
case.file(let name, let size):
return size
case.directory(let name, let contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case.file(let name, let size):
return 1
case.directory(let name, let contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case.file(let name, let size):
return 1
case.directory(let name, let contents):
return contents.map { $0.treeDepth }.max()?? 0 + 1
}
}
}```swift
indirect enum FileSystemNode {
case file(name: String, size: Int)
case directory(name: String, contents: [FileSystemNode])
}
protocol FileSystemInfo {
var totalSize: Int { get }
var filesCount: Int { get }
var treeDepth: Int { get }
}
// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode: FileSystemInfo {
var totalSize: Int {
switch self {
case.file(let name, let size):
return size
case.directory(let name, let contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case.file(let name, let size):
return 1
case.directory(let name, let contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case.file(let name, let size):
return 1
case.directory(let name, let contents):
return contents.map { $0.treeDepth }.max()?? 0 + 1
}
}
}
// Example of usage.
let fileSystem: FileSystemNode =.directory(name: "root", contents: [
.file(name: "file1", size: 100),
.file(name: "file2", size: 200),
.directory(name: "dir1", contents: [
.file(name: "file3", size: 300),
.file(name: "file4", size: 400),
.directory(name: "dir2", contents: [
.file(name: "file5", size: 500),
.file(name: "file6", size: 600),
.file(name: "file7", size: 700),
]),
]),
])
print("Total size: \(fileSystem.totalSize)")
print("Files count: \(fileSystem.filesCount)")
print("Tree depth: \(fileSystem.treeDepth)")
```case.file(let name, let size): // immutable value 'name' was never used; consider replacing with '_' or removing itcase.directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing itcase.file(let name, let size): // immutable value 'size' was never used; consider replacing with '_' or removing itcase.file(let name, let size): // immutable value 'name' was never used; consider replacing with '_' or removing itcase.directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing itreturn contents.map { $0.treeDepth }.max()?? 0 + 1 // consecutive statements on a line must be separated by ';'return contents.map { $0.treeDepth }.max()?? 0 + 1 // result of operator '+' is unusedreturn contents.map { $0.treeDepth }.max()?? 0 + 1 // value of optional type 'Int?' must be unwrapped to a value of type 'Int'return contents.map { $0.treeDepth }.max()?? 0 + 1 // cannot use optional chaining on non-optional value of type 'Int'indirect enum FileSystemNode {
case file(name: String, size: Int)
case directory(name: String, contents: [FileSystemNode])
}
protocol FileSystemInfo {
var totalSize: Int { get }
var filesCount: Int { get }
var treeDepth: Int { get }
}
extension FileSystemNode: FileSystemInfo {
var totalSize: Int {
switch self {
case let.file(_, size):
return size
case let.directory(_, contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case let.file(_, _):
return 1
case let.directory(_, contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case.file:
return 1
case let.directory(_, contents):
return contents.map { $0.treeDepth }.max()?? 0
}
}
}
extension FileSystemNode {
static func createFileSystem(from nodes: [FileSystemNode]) -> FileSystemNode {
return nodes.reduce(FileSystemNode.directory(name: "/", contents: [])) {
switch ($0, $1) {
case let (.directory(name: parentName, contents: parentContents),.directory(name: childName, contents: childContents)):
return.directory(name: parentName + "/" + childName, contents: parentContents + childContents)
case let (.directory(name: parentName, contents: parentContents),.file(name: childName, size: childSize)):
return.directory(name: parentName + "/" + childName, contents: parentContents + [childContents])
case let (.file(name: parentName, size: parentSize),.directory(name: childName, contents: childContents)):
return.directory(name: parentName + "/" + childName, contents: [parentContents] + childContents)
case let (.file(name: parentName, size: parentSize),.file(name: childName, size: childSize)):
return.directory(name: parentName + "/" + childName, contents: [parentContents, childContents])
}
}
}
}
extension FileSystemNode {
static func createNodes(from tree: FileSystemNode) -> [FileSystemNode] {
switch tree {
case let.file(name: name, size: size):
return [.file(name: name, size: size)]
case let.directory(name: name, contents: contents):
return [.directory(name: name, contents: contents.flatMap { createNodes(from: $0) })]
}
}
}```swift
indirect enum FileSystemNode {
case file(name: String, size: Int)
case directory(name: String, contents: [FileSystemNode])
}
protocol FileSystemInfo {
var totalSize: Int { get }
var filesCount: Int { get }
var treeDepth: Int { get }
}
// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode: FileSystemInfo {
var totalSize: Int {
switch self {
case let.file(_, size):
return size
case let.directory(_, contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case let.file(_, _):
return 1
case let.directory(_, contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case.file:
return 1
case let.directory(_, contents):
return contents.map { $0.treeDepth }.max()?? 0
}
}
}
// File system manager.
// Used to create file system tree from file system nodes.
extension FileSystemNode {
static func createFileSystem(from nodes: [FileSystemNode]) -> FileSystemNode {
return nodes.reduce(FileSystemNode.directory(name: "/", contents: [])) {
switch ($0, $1) {
case let (.directory(name: parentName, contents: parentContents),.directory(name: childName, contents: childContents)):
return.directory(name: parentName + "/" + childName, contents: parentContents + childContents)
case let (.directory(name: parentName, contents: parentContents),.file(name: childName, size: childSize)):
return.directory(name: parentName + "/" + childName, contents: parentContents + [childContents])
case let (.file(name: parentName, size: parentSize),.directory(name: childName, contents: childContents)):
return.directory(name: parentName + "/" + childName, contents: [parentContents] + childContents)
case let (.file(name: parentName, size: parentSize),.file(name: childName, size: childSize)):
return.directory(name: parentName + "/" + childName, contents: [parentContents, childContents])
}
}
}
}
// File system nodes creation.
// Used to create file system nodes from file system tree.
extension FileSystemNode {
static func createNodes(from tree: FileSystemNode) -> [FileSystemNode] {
switch tree {
case let.file(name: name, size: size):
return [.file(name: name, size: size)]
case let.directory(name: name, contents: contents):
return [.directory(name: name, contents: contents.flatMap { createNodes(from: $0) })]
}
}
}
// File system nodes creation.
// Used to create file system nodes from file system tree.
extension FileSystemNode {
static func createNodes(from tree: FileSystemNode) -> [FileSystemNode] {
switch tree {
case let.file(name: name, size: size):
return [.file(name: name, size: size)]
case let.directory(name: name, contents: contents):
return [.directory(name: name, contents: contents.flatMap { createNodes(from: $0) })]
}
}
}
// File system nodes creation.
// Used to create file system nodes from file system tree.
extension FileSystemNode {
static func createNodes(from tree: FileSystemNode) -> [FileSystemNode] {
switch tree {
case let.file(name: name, size: size):
return [.file(name: name, size: size)]
case let.directory(name: name, contents: contents):
return [.directory(name: name, contents: contents.flatMap { createNodes(from: $0) })]
}
}
}
// File system nodes creation.
// Used to create file system nodes from file system tree.
extension FileSystemNode {
static func createNodes(from tree: FileSystemNode) -> [FileSystemNode] {
switch tree {
case let.file(name: name, size: size):
return [.file(name: name, size: size)]
case let.directory(name: name, contents: contents):
return [.directory(name: name, contents: contents.flatMap { createNodes(from: $0) })]
}
}
}
// File system nodes creation.
// Used to create file system nodes from file system tree.
extension FileSystemNode {
static func createNodes(from tree: FileSystemNode) -> [FileSystemNode] {
switch tree {
case let.file(name: name, size: size):
return [.file(name: name, size: size)]
case let.directory(name: name, contents: contents):
return [.directory(name: name,case let.file(_, _): // 'let' pattern has no effect; sub-pattern didn't bind any variablesreturn contents.map { $0.treeDepth }.max()?? 0 // cannot use optional chaining on non-optional value of type 'Int'return contents.map { $0.treeDepth }.max()?? 0 // value of optional type 'Int?' must be unwrapped to a value of type 'Int'return contents.map { $0.treeDepth }.max()?? 0 // integer literal is unusedreturn contents.map { $0.treeDepth }.max()?? 0 // consecutive statements on a line must be separated by ';'return.directory(name: parentName + "/" + childName, contents: parentContents + [childContents]) // cannot find 'childContents' in scopereturn.directory(name: parentName + "/" + childName, contents: [parentContents] + childContents) // cannot find 'parentContents' in scopereturn.directory(name: parentName + "/" + childName, contents: [parentContents, childContents]) // cannot find 'childContents' in scopereturn.directory(name: parentName + "/" + childName, contents: [parentContents, childContents]) // cannot find 'parentContents' in scopeindirect enum FileSystemNode {
case file(name: String, size: Int)
case directory(name: String, contents: [FileSystemNode])
}
protocol FileSystemInfo {
var totalSize: Int { get }
var filesCount: Int { get }
var treeDepth: Int { get }
}
extension FileSystemNode: FileSystemInfo {
var totalSize: Int {
switch self {
case let.file(_, size):
return size
case let.directory(_, contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case let.file:
return 1
case let.directory(_, contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case let.file:
return 1
case let.directory(_, contents):
return contents.map { $0.treeDepth }.max()?? 0
}
}
}```swift
indirect enum FileSystemNode {
case file(name: String, size: Int)
case directory(name: String, contents: [FileSystemNode])
}
protocol FileSystemInfo {
var totalSize: Int { get }
var filesCount: Int { get }
var treeDepth: Int { get }
}
// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode: FileSystemInfo {
var totalSize: Int {
switch self {
case let.file(_, size):
return size
case let.directory(_, contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case let.file:
return 1
case let.directory(_, contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case let.file:
return 1
case let.directory(_, contents):
return contents.map { $0.treeDepth }.max()?? 0
}
}
}
let fileSystem = FileSystemNode.directory(name: "root", contents: [
.file(name: "file1", size: 10),
.file(name: "file2", size: 20),
.directory(name: "dir1", contents: [
.file(name: "file3", size: 30),
.file(name: "file4", size: 40),
.directory(name: "dir2", contents: [
.file(name: "file5", size: 50),
.file(name: "file6", size: 60)
])
])
])
print(fileSystem.totalSize) // 210
print(fileSystem.filesCount) // 6
print(fileSystem.treeDepth) // 3
```case let.file: // 'let' pattern has no effect; sub-pattern didn't bind any variablescase let.file: // 'let' pattern has no effect; sub-pattern didn't bind any variablesreturn contents.map { $0.treeDepth }.max()?? 0 // consecutive statements on a line must be separated by ';'return contents.map { $0.treeDepth }.max()?? 0 // cannot use optional chaining on non-optional value of type 'Int'return contents.map { $0.treeDepth }.max()?? 0 // value of optional type 'Int?' must be unwrapped to a value of type 'Int'return contents.map { $0.treeDepth }.max()?? 0 // integer literal is unusedindirect enum FileSystemNode {
case file(name: String, size: Int)
case directory(name: String, contents: [FileSystemNode])
}
protocol FileSystemInfo {
var totalSize: Int { get }
var filesCount: Int { get }
var treeDepth: Int { get }
}
extension FileSystemNode: FileSystemInfo {
var totalSize: Int {
switch self {
case let.file(_, size):
return size
case let.directory(_, contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case let.file:
return 1
case let.directory(_, contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case let.file:
return 1
case let.directory(_, contents):
return contents.reduce(0) { max($0, $1.treeDepth) } + 1
}
}
}```swift
indirect enum FileSystemNode {
case file(name: String, size: Int)
case directory(name: String, contents: [FileSystemNode])
}
protocol FileSystemInfo {
var totalSize: Int { get }
var filesCount: Int { get }
var treeDepth: Int { get }
}
// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode: FileSystemInfo {
var totalSize: Int {
switch self {
case let.file(_, size):
return size
case let.directory(_, contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case let.file:
return 1
case let.directory(_, contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case let.file:
return 1
case let.directory(_, contents):
return contents.reduce(0) { max($0, $1.treeDepth) } + 1
}
}
}
// Example usage.
let fileSystem: FileSystemNode =.directory(name: "root", contents: [
.file(name: "file1", size: 10),
.file(name: "file2", size: 20),
.directory(name: "dir1", contents: [
.file(name: "file3", size: 30),
.file(name: "file4", size: 40),
.directory(name: "dir2", contents: [
.file(name: "file5", size: 50),
.file(name: "file6", size: 60),
]),
]),
.directory(name: "dir2", contents: [
.file(name: "file7", size: 70),
.file(name: "file8", size: 80),
]),
])
print("Total size: \(fileSystem.totalSize)")
print("Files count: \(fileSystem.filesCount)")
print("Tree depth: \(fileSystem.treeDepth)")
```case let.file: // 'let' pattern has no effect; sub-pattern didn't bind any variablescase let.file: // 'let' pattern has no effect; sub-pattern didn't bind any variablesindirect enum FileSystemNode {
case file(name: String, size: Int)
case directory(name: String, contents: [FileSystemNode])
}
protocol FileSystemInfo {
var totalSize: Int { get }
var filesCount: Int { get }
var treeDepth: Int { get }
}
extension FileSystemNode: FileSystemInfo {
var totalSize: Int {
switch self {
case.file(let name, let size):
return size
case.directory(let name, let contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case.file(let name, let size):
return 1
case.directory(let name, let contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case.file(let name, let size):
return 0
case.directory(let name, let contents):
return contents.map { $0.treeDepth }.max()! + 1
}
}
}```swift
indirect enum FileSystemNode {
case file(name: String, size: Int)
case directory(name: String, contents: [FileSystemNode])
}
protocol FileSystemInfo {
var totalSize: Int { get }
var filesCount: Int { get }
var treeDepth: Int { get }
}
// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode: FileSystemInfo {
var totalSize: Int {
switch self {
case.file(let name, let size):
return size
case.directory(let name, let contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case.file(let name, let size):
return 1
case.directory(let name, let contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case.file(let name, let size):
return 0
case.directory(let name, let contents):
return contents.map { $0.treeDepth }.max()! + 1
}
}
}
// Example of usage.
let fileSystem = FileSystemNode.directory(name: "root", contents: [
.file(name: "file1", size: 10),
.file(name: "file2", size: 20),
.directory(name: "dir1", contents: [
.file(name: "file3", size: 30),
.file(name: "file4", size: 40),
.directory(name: "dir2", contents: [
.file(name: "file5", size: 50),
.file(name: "file6", size: 60)
])
])
])
print(fileSystem.totalSize) // 210
print(fileSystem.filesCount) // 6
print(fileSystem.treeDepth) // 3
```case.file(let name, let size): // immutable value 'name' was never used; consider replacing with '_' or removing itcase.directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing itcase.file(let name, let size): // immutable value 'size' was never used; consider replacing with '_' or removing itcase.file(let name, let size): // immutable value 'name' was never used; consider replacing with '_' or removing itcase.directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing itcase.file(let name, let size): // immutable value 'size' was never used; consider replacing with '_' or removing itcase.file(let name, let size): // immutable value 'name' was never used; consider replacing with '_' or removing itcase.directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing it // Fatal error: Unexpectedly found nil while unwrapping an Optional valueindirect enum FileSystemNode {
case file(name: String, size: Int)
case directory(name: String, contents: [FileSystemNode])
}
protocol FileSystemInfo {
var totalSize: Int { get }
var filesCount: Int { get }
var treeDepth: Int { get }
}
extension FileSystemNode: FileSystemInfo {
var totalSize: Int {
switch self {
case.file(_, let size):
return size
case.directory(_, let contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case.file:
return 1
case.directory(_, let contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case.file:
return 1
case.directory(_, let contents):
return 1 + contents.map { $0.treeDepth }.max()!
}
}
}```swift
indirect enum FileSystemNode {
case file(name: String, size: Int)
case directory(name: String, contents: [FileSystemNode])
}
protocol FileSystemInfo {
var totalSize: Int { get }
var filesCount: Int { get }
var treeDepth: Int { get }
}
// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode: FileSystemInfo {
var totalSize: Int {
switch self {
case.file(_, let size):
return size
case.directory(_, let contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case.file:
return 1
case.directory(_, let contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case.file:
return 1
case.directory(_, let contents):
return 1 + contents.map { $0.treeDepth }.max()!
}
}
}
// Example of usage.
let root = FileSystemNode.directory(name: "root", contents: [
FileSystemNode.directory(name: "dir1", contents: [
FileSystemNode.file(name: "file1", size: 10),
FileSystemNode.file(name: "file2", size: 20),
FileSystemNode.file(name: "file3", size: 30),
FileSystemNode.directory(name: "dir2", contents: [
FileSystemNode.file(name: "file4", size: 40),
FileSystemNode.file(name: "file5", size: 50),
FileSystemNode.file(name: "file6", size: 60),
]),
FileSystemNode.file(name: "file7", size: 70),
]),
FileSystemNode.file(name: "file8", size: 80),
FileSystemNode.file(name: "file9", size: 90),
])
print("Total size: \(root.totalSize)")
print("Files count: \(root.filesCount)")
print("Tree depth: \(root.treeDepth)")
``` // Fatal error: Unexpectedly found nil while unwrapping an Optional valueindirect enum FileSystemNode {
case file(name: String, size: Int)
case directory(name: String, contents: [FileSystemNode])
}
protocol FileSystemInfo {
var totalSize: Int { get }
var filesCount: Int { get }
var treeDepth: Int { get }
}
extension FileSystemNode: FileSystemInfo {
var totalSize: Int {
switch self {
case let.file(_, size):
return size
case let.directory(_, contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case let.file:
return 1
case let.directory(_, contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case let.file:
return 1
case let.directory(_, contents):
return 1 + contents.map { $0.treeDepth }.max()!
}
}
}```swift
indirect enum FileSystemNode {
case file(name: String, size: Int)
case directory(name: String, contents: [FileSystemNode])
}
protocol FileSystemInfo {
var totalSize: Int { get }
var filesCount: Int { get }
var treeDepth: Int { get }
}
// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode: FileSystemInfo {
var totalSize: Int {
switch self {
case let.file(_, size):
return size
case let.directory(_, contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case let.file:
return 1
case let.directory(_, contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case let.file:
return 1
case let.directory(_, contents):
return 1 + contents.map { $0.treeDepth }.max()!
}
}
}
// Example of usage.
let fileSystem = FileSystemNode.directory(
name: "root",
contents: [
.file(name: "file1", size: 10),
.file(name: "file2", size: 20),
.directory(
name: "dir1",
contents: [
.file(name: "file3", size: 30),
.file(name: "file4", size: 40),
.directory(
name: "dir2",
contents: [
.file(name: "file5", size: 50),
.file(name: "file6", size: 60)
]
)
]
)
]
)
print(fileSystem.totalSize) // 210
print(fileSystem.filesCount) // 6
print(fileSystem.treeDepth) // 3
```case let.file: // 'let' pattern has no effect; sub-pattern didn't bind any variablescase let.file: // 'let' pattern has no effect; sub-pattern didn't bind any variables // Fatal error: Unexpectedly found nil while unwrapping an Optional valueindirect enum FileSystemNode {
case file(name: String, size: Int)
case directory(name: String, contents: [FileSystemNode])
}
protocol FileSystemInfo {
var totalSize: Int { get }
var filesCount: Int { get }
var treeDepth: Int { get }
}
extension FileSystemNode: FileSystemInfo {
var totalSize: Int {
switch self {
case.file(let name, let size):
return size
case.directory(let name, let contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case.file(let name, let size):
return 1
case.directory(let name, let contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case.file(let name, let size):
return 1
case.directory(let name, let contents):
return contents.reduce(0) { max($0, $1.treeDepth) } + 1
}
}
}```swift
indirect enum FileSystemNode {
case file(name: String, size: Int)
case directory(name: String, contents: [FileSystemNode])
}
protocol FileSystemInfo {
var totalSize: Int { get }
var filesCount: Int { get }
var treeDepth: Int { get }
}
// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode: FileSystemInfo {
var totalSize: Int {
switch self {
case.file(let name, let size):
return size
case.directory(let name, let contents):
return contents.reduce(0) { $0 + $1.totalSize }
}
}
var filesCount: Int {
switch self {
case.file(let name, let size):
return 1
case.directory(let name, let contents):
return contents.reduce(0) { $0 + $1.filesCount }
}
}
var treeDepth: Int {
switch self {
case.file(let name, let size):
return 1
case.directory(let name, let contents):
return contents.reduce(0) { max($0, $1.treeDepth) } + 1
}
}
}
// Example of usage.
let root = FileSystemNode.directory(name: "root", contents: [
FileSystemNode.file(name: "file1", size: 10),
FileSystemNode.file(name: "file2", size: 20),
FileSystemNode.directory(name: "dir1", contents: [
FileSystemNode.file(name: "file3", size: 30),
FileSystemNode.file(name: "file4", size: 40),
FileSystemNode.directory(name: "dir2", contents: [
FileSystemNode.file(name: "file5", size: 50),
FileSystemNode.file(name: "file6", size: 60)
])
])
])
print("Total size: \(root.totalSize)")
print("Files count: \(root.filesCount)")
print("Tree depth: \(root.treeDepth)")
```case.file(let name, let size): // immutable value 'name' was never used; consider replacing with '_' or removing itcase.directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing itcase.file(let name, let size): // immutable value 'size' was never used; consider replacing with '_' or removing itcase.file(let name, let size): // immutable value 'name' was never used; consider replacing with '_' or removing itcase.directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing itcase.file(let name, let size): // immutable value 'size' was never used; consider replacing with '_' or removing itcase.file(let name, let size): // immutable value 'name' was never used; consider replacing with '_' or removing itcase.directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing itprotocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
class Stack<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack2<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack3<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack4<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack5<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack6<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack7<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack8<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack9<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack10<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack11<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack12<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack13<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack14<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}```swift
protocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack2<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack3<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack4<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack5<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack6<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack7<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack8<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack9<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack10<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack11<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack12<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack13<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack14<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack15<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func popvar stack = Stack<Int>() // variable 'stack' was never mutated; consider changing to 'let' constantprotocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
class Stack<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack2<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack3<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack4<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack5<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack6<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack7<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack8<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack9<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack10<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack11<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack12<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack13<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack14<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}```swift
protocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack2<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack3<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack4<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack5<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack6<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack7<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack8<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack9<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack10<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack11<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack12<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack13<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack14<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack15<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func popvar stack = Stack<Int>() // variable 'stack' was never mutated; consider changing to 'let' constantprotocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
class Stack<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack2<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack3<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}```swift
protocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack2<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack3<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
```var stack = Stack<Int>() // variable 'stack' was never mutated; consider changing to 'let' constantprotocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
class Stack<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack2<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack3<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack4<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack5<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack6<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack7<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack8<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack9<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack10<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack11<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack12<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack13<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack14<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}```swift
protocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack2<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack3<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack4<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack5<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack6<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack7<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack8<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack9<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack10<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack11<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack12<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack13<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack14<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack15<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func popvar stack = Stack<Int>() // variable 'stack' was never mutated; consider changing to 'let' constantprotocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
class Stack<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack2<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack3<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack4<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack5<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack6<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack7<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack8<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack9<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack10<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack11<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack12<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack13<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack14<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}```swift
protocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack2<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack3<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack4<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack5<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack6<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack7<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack8<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack9<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack10<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack11<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack12<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack13<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack14<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack15<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func popvar stack = Stack<Int>() // variable 'stack' was never mutated; consider changing to 'let' constantprotocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
class Stack<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack2<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack3<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack4<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack5<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack6<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack7<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack8<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack9<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack10<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack11<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack12<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack13<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack14<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}```swift
protocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack2<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack3<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack4<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack5<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack6<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack7<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack8<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack9<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack10<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack11<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack12<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack13<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack14<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack15<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func popvar stack = Stack<Int>() // variable 'stack' was never mutated; consider changing to 'let' constantprotocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
class Stack<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack2<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack3<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack4<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack5<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack6<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack7<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack8<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack9<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack10<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack11<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack12<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack13<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack14<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}```swift
protocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack2<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack3<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack4<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack5<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack6<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack7<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack8<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack9<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack10<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack11<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack12<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack13<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack14<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack15<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func popvar stack = Stack<Int>() // variable 'stack' was never mutated; consider changing to 'let' constantprotocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
class Stack<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack2<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack3<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack4<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack5<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack6<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack7<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack8<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack9<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack10<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack11<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack12<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack13<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack14<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}```swift
protocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack2<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack3<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack4<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack5<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack6<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack7<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack8<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack9<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack10<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack11<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack12<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack13<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack14<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack15<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func popvar stack = Stack<Int>() // variable 'stack' was never mutated; consider changing to 'let' constantprotocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
class Stack<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack2<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack3<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack4<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack5<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack6<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack7<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack8<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack9<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack10<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack11<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack12<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack13<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
class Stack14<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}```swift
protocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack2<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack3<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack4<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack5<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack6<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack7<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack8<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack9<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack10<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack11<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack12<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack13<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack14<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.popLast()
}
}
// Generic stack with push and pop functions.
class Stack15<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func popvar stack = Stack<Int>() // variable 'stack' was never mutated; consider changing to 'let' constantprotocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
class Stack<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.removeLast()
}
}
class Stack2<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.removeLast()
}
}
class Stack3<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.removeLast()
}
}
class Stack4<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.removeLast()
}
}
class Stack5<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.removeLast()
}
}
class Stack6<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.removeLast()
}
}
class Stack7<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.removeLast()
}
}
class Stack8<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.removeLast()
}
}
class Stack9<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.removeLast()
}
}
class Stack10<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.removeLast()
}
}
class Stack11<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.removeLast()
}
}
class Stack12<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.removeLast()
}
}
class Stack13<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.removeLast()
}
}
class Stack14<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.removeLast()
}
}```swift
protocol StackProtocol {
associatedtype Element
init()
func push(_ element: Element)
func pop() -> Element?
}
// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.removeLast()
}
}
// Generic stack with push and pop functions.
class Stack2<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.removeLast()
}
}
// Generic stack with push and pop functions.
class Stack3<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.removeLast()
}
}
// Generic stack with push and pop functions.
class Stack4<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.removeLast()
}
}
// Generic stack with push and pop functions.
class Stack5<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.removeLast()
}
}
// Generic stack with push and pop functions.
class Stack6<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.removeLast()
}
}
// Generic stack with push and pop functions.
class Stack7<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.removeLast()
}
}
// Generic stack with push and pop functions.
class Stack8<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.removeLast()
}
}
// Generic stack with push and pop functions.
class Stack9<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.removeLast()
}
}
// Generic stack with push and pop functions.
class Stack10<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.removeLast()
}
}
// Generic stack with push and pop functions.
class Stack11<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.removeLast()
}
}
// Generic stack with push and pop functions.
class Stack12<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.removeLast()
}
}
// Generic stack with push and pop functions.
class Stack13<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.removeLast()
}
}
// Generic stack with push and pop functions.
class Stack14<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func pop() -> Element? {
return items.removeLast()
}
}
// Generic stack with push and pop functions.
class Stack15<Element>: StackProtocol {
var items = [Element]()
required init() {}
func push(_ element: Element) {
items.append(element)
}
func popvar stack = Stack<Int>() // variable 'stack' was never mutated; consider changing to 'let' constant // Fatal error: Can't remove last element from an empty collectionprotocol CacheProtocol {
associatedtype Key: Hashable
associatedtype Element
init(capacity: Int)
subscript(key: Key) -> Element? { get set }
}
class Cache<Key: Hashable, Element>: CacheProtocol {
typealias Node = (key: Key, value: Element)
private var capacity: Int
private var cache: [Node] = []
private var cacheMap: [Key: Node] = [:]
required init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let node = cacheMap[key] {
cache.remove(at: cache.firstIndex(of: node)!)
cache.append(node)
return node.value
}
return nil
}
set {
if let node = cacheMap[key] {
cache.remove(at: cache.firstIndex(of: node)!)
cache.append(node)
} else {
cache.append((key, newValue!))
cacheMap[key] = cache.last
}
if cache.count > capacity {
cache.removeFirst()
cacheMap.removeValue(forKey: cache.first!.key)
}
}
}
}
class DiskCache<Key: Hashable, Element>: CacheProtocol {
typealias Node = (key: Key, value: Element)
private var capacity: Int
private var cache: [Node] = []
private var cacheMap: [Key: Node] = [:]
private var diskCache: [Node] = []
private var diskCacheMap: [Key: Node] = [:]
private let diskCachePath: String
required init(capacity: Int, diskCachePath: String) {
self.capacity = capacity
self.diskCachePath = diskCachePath
loadDiskCache()
}
subscript(key: Key) -> Element? {
get {
if let node = cacheMap[key] {
cache.remove(at: cache.firstIndex(of: node)!)
cache.append(node)
return node.value
}
if let node = diskCacheMap[key] {
diskCache.remove(at: diskCache.firstIndex(of: node)!)
diskCache.append(node)
cache.append(node)
cacheMap[key] = cache.last
return node.value
}
return nil
}
set {
if let node = cacheMap[key] {
cache.remove(at: cache.firstIndex(of: node)!)
cache.append(node)
} else {
cache.append((key, newValue!))
cacheMap[key] = cache.last
}
if cache.count > capacity {
cache.removeFirst()
cacheMap.removeValue(forKey: cache.first!.key)
}
if let node = diskCacheMap[key] {
diskCache.remove(at: diskCache.firstIndex(of: node)!)
diskCache.append(node)
} else {
diskCache.append((key, newValue!))
diskCacheMap[key] = diskCache.last
}
saveDiskCache()
}
}
private func loadDiskCache() {
if let data = try? Data(contentsOf: URL(fileURLWithPath: diskCachePath)) {
let decoder = JSONDecoder()
diskCache = try! decoder.decode([Node].self, from: data)
diskCacheMap = Dictionary(uniqueKeysWithValues: diskCache.map { ($0.key, $0) })
}
}
private func saveDiskCache() {
let encoder = JSONEncoder()
if let data = try? encoder.encode(diskCache) {
try? data.write(to: URL(fileURLWithPath: diskCachePath))
}
}
}```swift
protocol CacheProtocol {
associatedtype Key: Hashable
associatedtype Element
init(capacity: Int)
subscript(key: Key) -> Element? { get set }
}
// Generic in-memory cache that follows to the LRU (Least Recently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least recently used item to make space for new entries.
class Cache<Key: Hashable, Element>: CacheProtocol {
typealias Node = (key: Key, value: Element)
private var capacity: Int
private var cache: [Node] = []
private var cacheMap: [Key: Node] = [:]
required init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let node = cacheMap[key] {
cache.remove(at: cache.firstIndex(of: node)!)
cache.append(node)
return node.value
}
return nil
}
set {
if let node = cacheMap[key] {
cache.remove(at: cache.firstIndex(of: node)!)
cache.append(node)
} else {
cache.append((key, newValue!))
cacheMap[key] = cache.last
}
if cache.count > capacity {
cache.removeFirst()
cacheMap.removeValue(forKey: cache.first!.key)
}
}
}
}
// Generic on-disk cache that follows to the LRU (Least Recently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least recently used item to make space for new entries.
// The cache should also be able to persist its contents to disk.
class DiskCache<Key: Hashable, Element>: CacheProtocol {
typealias Node = (key: Key, value: Element)
private var capacity: Int
private var cache: [Node] = []
private var cacheMap: [Key: Node] = [:]
private var diskCache: [Node] = []
private var diskCacheMap: [Key: Node] = [:]
private let diskCachePath: String
required init(capacity: Int, diskCachePath: String) {
self.capacity = capacity
self.diskCachePath = diskCachePath
loadDiskCache()
}
subscript(key: Key) -> Element? {
get {
if let node = cacheMap[key] {
cache.remove(at: cache.firstIndex(of: node)!)
cache.append(node)
return node.value
}
if let node = diskCacheMap[key] {
diskCache.remove(at: diskCache.firstIndex(of: node)!)
diskCache.append(node)
cache.append(node)
cacheMap[key] = cache.last
return node.value
}
return nil
}
set {
if let node = cacheMap[key] {
cache.remove(at: cache.firstIndex(of: node)!)
cache.append(node)
} else {
cache.append((key, newValue!))
cacheMap[key] = cache.last
}
if cache.count > capacity {
cache.removeFirst()
cacheMap.removeValue(forKey: cache.first!.key)
}
if let node = diskCacheMap[key] {
diskCache.remove(at: diskCache.firstIndex(of: node)!)
diskCache.append(node)
} else {
diskCache.append((key, newValue!))
diskCacheMap[key] = diskCache.last
}
saveDiskCache()
}
}
private func loadDiskCache() {
if let data = try? Data(contentsOf: URL(fileURLWithPath: diskCachePath)) {
let decoder = JSONDecoder()
diskCache = try! decoder.decode([Node].self, from: data)
diskCacheMap = Dictionary(uniqueKeysWithValues: diskCache.map { ($0.key, $0) })
}
}
private func saveDiskCache() {
let encoder = JSONEncoder()
if let data = try? encoder.encode(diskCache) {
try? data.write(to: URL(fileURLWithPath: diskCachePath))
}
}
}
```cache.remove(at: cache.firstIndex(of: node)!) // type '(key: Key, value: Element)' cannot conform to 'Equatable'cache.remove(at: cache.firstIndex(of: node)!) // type '(key: Key, value: Element)' cannot conform to 'Equatable'class DiskCache<Key: Hashable, Element>: CacheProtocol { // type 'DiskCache<Key, Element>' does not conform to protocol 'CacheProtocol'cache.remove(at: cache.firstIndex(of: node)!) // type '(key: Key, value: Element)' cannot conform to 'Equatable'diskCache.remove(at: diskCache.firstIndex(of: node)!) // type '(key: Key, value: Element)' cannot conform to 'Equatable'cache.remove(at: cache.firstIndex(of: node)!) // type '(key: Key, value: Element)' cannot conform to 'Equatable'diskCache.remove(at: diskCache.firstIndex(of: node)!) // type '(key: Key, value: Element)' cannot conform to 'Equatable'diskCache = try! decoder.decode([Node].self, from: data) // type 'DiskCache<Key, Element>.Node' (aka '(key: Key, value: Element)') cannot conform to 'Decodable'if let data = try? encoder.encode(diskCache) { // type '(key: Key, value: Element)' cannot conform to 'Encodable'protocol CacheProtocol {
associatedtype Key: Hashable
associatedtype Element
init(capacity: Int)
subscript(key: Key) -> Element? { get set }
}
class Cache<Key: Hashable, Element>: CacheProtocol {
private var capacity: Int
private var cache: [Key: Element] = [:]
private var order: [Key] = []
required init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let index = order.firstIndex(of: key) {
order.remove(at: index)
order.append(key)
return cache[key]
}
return nil
}
set {
if let index = order.firstIndex(of: key) {
order.remove(at: index)
order.append(key)
cache[key] = newValue
} else {
if order.count == capacity {
cache.removeValue(forKey: order.first!)
order.removeFirst()
}
order.append(key)
cache[key] = newValue
}
}
}
}
class DiskCache<Key: Hashable, Element>: CacheProtocol {
private var capacity: Int
private var cache: [Key: Element] = [:]
private var order: [Key] = []
private var disk: DiskProtocol
required init(capacity: Int, disk: DiskProtocol) {
self.capacity = capacity
self.disk = disk
}
subscript(key: Key) -> Element? {
get {
if let index = order.firstIndex(of: key) {
order.remove(at: index)
order.append(key)
return cache[key]
}
return nil
}
set {
if let index = order.firstIndex(of: key) {
order.remove(at: index)
order.append(key)
cache[key] = newValue
} else {
if order.count == capacity {
cache.removeValue(forKey: order.first!)
order.removeFirst()
}
order.append(key)
cache[key] = newValue
}
}
}
}```swift
protocol CacheProtocol {
associatedtype Key: Hashable
associatedtype Element
init(capacity: Int)
subscript(key: Key) -> Element? { get set }
}
// Generic in-memory cache that follows to the LRU (Least Recently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least recently used item to make space for new entries.
class Cache<Key: Hashable, Element>: CacheProtocol {
private var capacity: Int
private var cache: [Key: Element] = [:]
private var order: [Key] = []
required init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let index = order.firstIndex(of: key) {
order.remove(at: index)
order.append(key)
return cache[key]
}
return nil
}
set {
if let index = order.firstIndex(of: key) {
order.remove(at: index)
order.append(key)
cache[key] = newValue
} else {
if order.count == capacity {
cache.removeValue(forKey: order.first!)
order.removeFirst()
}
order.append(key)
cache[key] = newValue
}
}
}
}
// Generic disk cache that follows to the LRU (Least Recently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least recently used item to make space for new entries.
// The cache should also be able to store and retrieve items from a disk.
class DiskCache<Key: Hashable, Element>: CacheProtocol {
private var capacity: Int
private var cache: [Key: Element] = [:]
private var order: [Key] = []
private var disk: DiskProtocol
required init(capacity: Int, disk: DiskProtocol) {
self.capacity = capacity
self.disk = disk
}
subscript(key: Key) -> Element? {
get {
if let index = order.firstIndex(of: key) {
order.remove(at: index)
order.append(key)
return cache[key]
}
return nil
}
set {
if let index = order.firstIndex(of: key) {
order.remove(at: index)
order.append(key)
cache[key] = newValue
} else {
if order.count == capacity {
cache.removeValue(forKey: order.first!)
order.removeFirst()
}
order.append(key)
cache[key] = newValue
}
}
}
}
```private var disk: DiskProtocol // cannot find type 'DiskProtocol' in scoperequired init(capacity: Int, disk: DiskProtocol) { // cannot find type 'DiskProtocol' in scopeprotocol CacheProtocol {
associatedtype Key: Hashable
associatedtype Element
init(capacity: Int)
subscript(key: Key) -> Element? { get set }
}
class Cache<Key: Hashable, Element>: CacheProtocol {
typealias Key = Key
typealias Element = Element
private var cache: [Key: Element] = [:]
private var capacity: Int
private var queue: [Key] = []
required init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let index = queue.firstIndex(of: key) {
queue.remove(at: index)
queue.append(key)
return cache[key]
}
return nil
}
set {
if let index = queue.firstIndex(of: key) {
queue.remove(at: index)
queue.append(key)
} else {
if queue.count == capacity {
queue.removeFirst()
}
queue.append(key)
}
cache[key] = newValue
}
}
}
class DiskCache<Key: Hashable, Element>: CacheProtocol {
typealias Key = Key
typealias Element = Element
private var cache: [Key: Element] = [:]
private var capacity: Int
private var queue: [Key] = []
private let fileManager: FileManager
private let cacheDirectory: URL
required init(capacity: Int, cacheDirectory: URL, fileManager: FileManager =.default) {
self.capacity = capacity
self.fileManager = fileManager
self.cacheDirectory = cacheDirectory
}
subscript(key: Key) -> Element? {
get {
if let index = queue.firstIndex(of: key) {
queue.remove(at: index)
queue.append(key)
return cache[key]
}
return nil
}
set {
if let index = queue.firstIndex(of: key) {
queue.remove(at: index)
queue.append(key)
} else {
if queue.count == capacity {
queue.removeFirst()
}
queue.append(key)
}
cache[key] = newValue
if let data = try? JSONEncoder().encode(cache) {
let url = cacheDirectory.appendingPathComponent("\(key).json")
try? data.write(to: url)
}
}
}
func load() {
let urls = try? fileManager.contentsOfDirectory(at: cacheDirectory, includingPropertiesForKeys: nil)
urls?.forEach { url in
guard let data = try? Data(contentsOf: url) else { return }
guard let cache = try? JSONDecoder().decode([Key: Element].self, from: data) else { return }
self.cache = cache
}
}
}```swift
protocol CacheProtocol {
associatedtype Key: Hashable
associatedtype Element
init(capacity: Int)
subscript(key: Key) -> Element? { get set }
}
// Generic in-memory cache that follows to the LRU (Least Recently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least recently used item to make space for new entries.
class Cache<Key: Hashable, Element>: CacheProtocol {
typealias Key = Key
typealias Element = Element
private var cache: [Key: Element] = [:]
private var capacity: Int
private var queue: [Key] = []
required init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let index = queue.firstIndex(of: key) {
queue.remove(at: index)
queue.append(key)
return cache[key]
}
return nil
}
set {
if let index = queue.firstIndex(of: key) {
queue.remove(at: index)
queue.append(key)
} else {
if queue.count == capacity {
queue.removeFirst()
}
queue.append(key)
}
cache[key] = newValue
}
}
}
// Generic on-disk cache that follows to the LRU (Least Recently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least recently used item to make space for new entries.
// The cache should also be able to persist its contents to disk.
class DiskCache<Key: Hashable, Element>: CacheProtocol {
typealias Key = Key
typealias Element = Element
private var cache: [Key: Element] = [:]
private var capacity: Int
private var queue: [Key] = []
private let fileManager: FileManager
private let cacheDirectory: URL
required init(capacity: Int, cacheDirectory: URL, fileManager: FileManager =.default) {
self.capacity = capacity
self.fileManager = fileManager
self.cacheDirectory = cacheDirectory
}
subscript(key: Key) -> Element? {
get {
if let index = queue.firstIndex(of: key) {
queue.remove(at: index)
queue.append(key)
return cache[key]
}
return nil
}
set {
if let index = queue.firstIndex(of: key) {
queue.remove(at: index)
queue.append(key)
} else {
if queue.count == capacity {
queue.removeFirst()
}
queue.append(key)
}
cache[key] = newValue
if let data = try? JSONEncoder().encode(cache) {
let url = cacheDirectory.appendingPathComponent("\(key).json")
try? data.write(to: url)
}
}
}
func load() {
let urls = try? fileManager.contentsOfDirectory(at: cacheDirectory, includingPropertiesForKeys: nil)
urls?.forEach { url in
guard let data = try? Data(contentsOf: url) else { return }
guard let cache = try? JSONDecoder().decode([Key: Element].self, from: data) else { return }
self.cache = cache
}
}
}
```class DiskCache<Key: Hashable, Element>: CacheProtocol { // type 'DiskCache<Key, Element>' does not conform to protocol 'CacheProtocol'required init(capacity: Int, cacheDirectory: URL, fileManager: FileManager =.default) { // '=' must have consistent whitespace on both sidesif let data = try? JSONEncoder().encode(cache) { // class 'JSONEncoder' requires that 'Element' conform to 'Encodable'if let data = try? JSONEncoder().encode(cache) { // class 'JSONEncoder' requires that 'Key' conform to 'Encodable'guard let cache = try? JSONDecoder().decode([Key: Element].self, from: data) else { return } // class 'JSONDecoder' requires that 'Element' conform to 'Decodable'guard let cache = try? JSONDecoder().decode([Key: Element].self, from: data) else { return } // class 'JSONDecoder' requires that 'Key' conform to 'Decodable'protocol CacheProtocol {
associatedtype Key: Hashable
associatedtype Element
init(capacity: Int)
subscript(key: Key) -> Element? { get set }
}
class Cache<Key: Hashable, Element>: CacheProtocol {
private var capacity: Int
private var cache: [Key: Element] = [:]
private var order: [Key] = []
required init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let element = cache[key] {
order.remove(at: order.firstIndex(of: key)!)
order.append(key)
return element
}
return nil
}
set {
if let element = newValue {
if cache.count == capacity {
cache.removeValue(forKey: order.first!)
order.removeFirst()
}
cache[key] = element
order.append(key)
}
}
}
}
class DiskCache<Key: Hashable, Element>: CacheProtocol {
private var capacity: Int
private var cache: [Key: Element] = [:]
private var order: [Key] = []
private var diskCache: [Key: Element] = [:]
required init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let element = cache[key] {
order.remove(at: order.firstIndex(of: key)!)
order.append(key)
return element
}
return nil
}
set {
if let element = newValue {
if cache.count == capacity {
cache.removeValue(forKey: order.first!)
order.removeFirst()
}
cache[key] = element
order.append(key)
}
}
}
}```swift
protocol CacheProtocol {
associatedtype Key: Hashable
associatedtype Element
init(capacity: Int)
subscript(key: Key) -> Element? { get set }
}
// Generic in-memory cache that follows to the LRU (Least Recently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least recently used item to make space for new entries.
class Cache<Key: Hashable, Element>: CacheProtocol {
private var capacity: Int
private var cache: [Key: Element] = [:]
private var order: [Key] = []
required init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let element = cache[key] {
order.remove(at: order.firstIndex(of: key)!)
order.append(key)
return element
}
return nil
}
set {
if let element = newValue {
if cache.count == capacity {
cache.removeValue(forKey: order.first!)
order.removeFirst()
}
cache[key] = element
order.append(key)
}
}
}
}
// Generic on-disk cache that follows to the LRU (Least Recently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least recently used item to make space for new entries.
// The cache should also be able to store and retrieve items from disk.
class DiskCache<Key: Hashable, Element>: CacheProtocol {
private var capacity: Int
private var cache: [Key: Element] = [:]
private var order: [Key] = []
private var diskCache: [Key: Element] = [:]
required init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let element = cache[key] {
order.remove(at: order.firstIndex(of: key)!)
order.append(key)
return element
}
return nil
}
set {
if let element = newValue {
if cache.count == capacity {
cache.removeValue(forKey: order.first!)
order.removeFirst()
}
cache[key] = element
order.append(key)
}
}
}
}
```protocol CacheProtocol {
associatedtype Key: Hashable
associatedtype Element
init(capacity: Int)
subscript(key: Key) -> Element? { get set }
}
class Cache<Key: Hashable, Element>: CacheProtocol {
typealias Key = Key
typealias Element = Element
private var capacity: Int
private var cache: [Key: Element] = [:]
private var accessOrder: [Key] = []
required init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
guard let element = cache[key] else { return nil }
accessOrder.removeAll(where: { $0 == key })
accessOrder.append(key)
return element
}
set {
guard let element = newValue else {
cache.removeValue(forKey: key)
accessOrder.removeAll(where: { $0 == key })
return
}
accessOrder.removeAll(where: { $0 == key })
accessOrder.append(key)
if cache.count == capacity {
cache.removeValue(forKey: accessOrder.first!)
}
cache[key] = element
}
}
}
class DiskCache<Key: Hashable, Element>: CacheProtocol {
typealias Key = Key
typealias Element = Element
private var capacity: Int
private var cache: [Key: Element] = [:]
private var accessOrder: [Key] = []
private var diskCache: [Key: Element] = [:]
required init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
guard let element = cache[key] else {
guard let element = diskCache[key] else { return nil }
cache[key] = element
return element
}
accessOrder.removeAll(where: { $0 == key })
accessOrder.append(key)
return element
}
set {
guard let element = newValue else {
cache.removeValue(forKey: key)
diskCache.removeValue(forKey: key)
accessOrder.removeAll(where: { $0 == key })
return
}
accessOrder.removeAll(where: { $0 == key })
accessOrder.append(key)
if cache.count == capacity {
cache.removeValue(forKey: accessOrder.first!)
}
cache[key] = element
}
}
}```swift
protocol CacheProtocol {
associatedtype Key: Hashable
associatedtype Element
init(capacity: Int)
subscript(key: Key) -> Element? { get set }
}
// Generic in-memory cache that follows to the LRU (Least Recently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least recently used item to make space for new entries.
class Cache<Key: Hashable, Element>: CacheProtocol {
typealias Key = Key
typealias Element = Element
private var capacity: Int
private var cache: [Key: Element] = [:]
private var accessOrder: [Key] = []
required init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
guard let element = cache[key] else { return nil }
accessOrder.removeAll(where: { $0 == key })
accessOrder.append(key)
return element
}
set {
guard let element = newValue else {
cache.removeValue(forKey: key)
accessOrder.removeAll(where: { $0 == key })
return
}
accessOrder.removeAll(where: { $0 == key })
accessOrder.append(key)
if cache.count == capacity {
cache.removeValue(forKey: accessOrder.first!)
}
cache[key] = element
}
}
}
// Generic disk-based cache that follows to the LRU (Least Recently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least recently used item to make space for new entries.
// The cache should also be able to persist its contents to disk.
class DiskCache<Key: Hashable, Element>: CacheProtocol {
typealias Key = Key
typealias Element = Element
private var capacity: Int
private var cache: [Key: Element] = [:]
private var accessOrder: [Key] = []
private var diskCache: [Key: Element] = [:]
required init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
guard let element = cache[key] else {
guard let element = diskCache[key] else { return nil }
cache[key] = element
return element
}
accessOrder.removeAll(where: { $0 == key })
accessOrder.append(key)
return element
}
set {
guard let element = newValue else {
cache.removeValue(forKey: key)
diskCache.removeValue(forKey: key)
accessOrder.removeAll(where: { $0 == key })
return
}
accessOrder.removeAll(where: { $0 == key })
accessOrder.append(key)
if cache.count == capacity {
cache.removeValue(forKey: accessOrder.first!)
}
cache[key] = element
}
}
}
```protocol CacheProtocol {
associatedtype Key: Hashable
associatedtype Element
init(capacity: Int)
subscript(key: Key) -> Element? { get set }
}
class Cache<Key: Hashable, Element>: CacheProtocol {
var capacity: Int
var cache: [Key: Element] = [:]
var order: [Key] = []
required init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let index = order.firstIndex(of: key) {
order.remove(at: index)
order.append(key)
return cache[key]
}
return nil
}
set {
if let index = order.firstIndex(of: key) {
order.remove(at: index)
order.append(key)
cache[key] = newValue
} else {
if order.count == capacity {
cache.removeValue(forKey: order.first!)
order.removeFirst()
}
order.append(key)
cache[key] = newValue
}
}
}
}```swift
protocol CacheProtocol {
associatedtype Key: Hashable
associatedtype Element
init(capacity: Int)
subscript(key: Key) -> Element? { get set }
}
// Generic in-memory cache that follows to the LRU (Least Recently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least recently used item to make space for new entries.
class Cache<Key: Hashable, Element>: CacheProtocol {
var capacity: Int
var cache: [Key: Element] = [:]
var order: [Key] = []
required init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let index = order.firstIndex(of: key) {
order.remove(at: index)
order.append(key)
return cache[key]
}
return nil
}
set {
if let index = order.firstIndex(of: key) {
order.remove(at: index)
order.append(key)
cache[key] = newValue
} else {
if order.count == capacity {
cache.removeValue(forKey: order.first!)
order.removeFirst()
}
order.append(key)
cache[key] = newValue
}
}
}
}
// Test
let cache = Cache<String, Int>(capacity: 2)
cache["key1"] = 1
cache["key2"] = 2
cache["key3"] = 3
cache["key1"]
cache["key2"]
cache["key3"]
cache["key4"] = 4
cache["key1"]
cache["key5"] = 5
cache["key1"]
cache["key2"]
cache["key3"]
cache["key4"]
cache["key5"]
```protocol CacheProtocol {
associatedtype Key: Hashable
associatedtype Element
init(capacity: Int)
subscript(key: Key) -> Element? { get set }
}
class Cache<Key: Hashable, Element>: CacheProtocol {
typealias Key = Key
typealias Element = Element
private var capacity: Int
private var cache: [Key: Element] = [:]
private var queue: [Key] = []
required init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let element = cache[key] {
queue.remove(at: queue.firstIndex(of: key)!)
queue.append(key)
return element
}
return nil
}
set {
if let element = newValue {
if cache.count == capacity {
cache.removeValue(forKey: queue.first!)
queue.removeFirst()
}
cache[key] = element
queue.append(key)
}
}
}
}
class DiskCache<Key: Hashable, Element>: CacheProtocol {
typealias Key = Key
typealias Element = Element
private var capacity: Int
private var cache: [Key: Element] = [:]
private var queue: [Key] = []
private var diskCache: [Key: Element] = [:]
required init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let element = cache[key] {
queue.remove(at: queue.firstIndex(of: key)!)
queue.append(key)
return element
}
return nil
}
set {
if let element = newValue {
if cache.count == capacity {
cache.removeValue(forKey: queue.first!)
queue.removeFirst()
}
cache[key] = element
queue.append(key)
}
}
}
func save() {
// Save the cache contents to disk.
}
func load() {
// Load the cache contents from disk.
}
}```swift
protocol CacheProtocol {
associatedtype Key: Hashable
associatedtype Element
init(capacity: Int)
subscript(key: Key) -> Element? { get set }
}
// Generic in-memory cache that follows to the LRU (Least Recently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least recently used item to make space for new entries.
class Cache<Key: Hashable, Element>: CacheProtocol {
typealias Key = Key
typealias Element = Element
private var capacity: Int
private var cache: [Key: Element] = [:]
private var queue: [Key] = []
required init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let element = cache[key] {
queue.remove(at: queue.firstIndex(of: key)!)
queue.append(key)
return element
}
return nil
}
set {
if let element = newValue {
if cache.count == capacity {
cache.removeValue(forKey: queue.first!)
queue.removeFirst()
}
cache[key] = element
queue.append(key)
}
}
}
}
// Generic on-disk cache that follows to the LRU (Least Recently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least recently used item to make space for new entries.
// The cache should also be able to persist its contents to disk.
class DiskCache<Key: Hashable, Element>: CacheProtocol {
typealias Key = Key
typealias Element = Element
private var capacity: Int
private var cache: [Key: Element] = [:]
private var queue: [Key] = []
private var diskCache: [Key: Element] = [:]
required init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let element = cache[key] {
queue.remove(at: queue.firstIndex(of: key)!)
queue.append(key)
return element
}
return nil
}
set {
if let element = newValue {
if cache.count == capacity {
cache.removeValue(forKey: queue.first!)
queue.removeFirst()
}
cache[key] = element
queue.append(key)
}
}
}
func save() {
// Save the cache contents to disk.
}
func load() {
// Load the cache contents from disk.
}
}
```protocol CacheProtocol {
associatedtype Key: Hashable
associatedtype Element
init(capacity: Int)
subscript(key: Key) -> Element? { get set }
}
class Cache<Key: Hashable, Element>: CacheProtocol {
typealias Key = Key
typealias Element = Element
private var capacity: Int
private var cache: [Key: Element] = [:]
private var order: [Key] = []
required init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let index = order.firstIndex(of: key) {
order.remove(at: index)
order.append(key)
return cache[key]
} else {
return nil
}
}
set {
if let index = order.firstIndex(of: key) {
order.remove(at: index)
order.append(key)
cache[key] = newValue
} else {
if order.count == capacity {
cache.removeValue(forKey: order.first!)
order.removeFirst()
}
order.append(key)
cache[key] = newValue
}
}
}
}```swift
protocol CacheProtocol {
associatedtype Key: Hashable
associatedtype Element
init(capacity: Int)
subscript(key: Key) -> Element? { get set }
}
// Generic in-memory cache that follows to the LRU (Least Recently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least recently used item to make space for new entries.
class Cache<Key: Hashable, Element>: CacheProtocol {
typealias Key = Key
typealias Element = Element
private var capacity: Int
private var cache: [Key: Element] = [:]
private var order: [Key] = []
required init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let index = order.firstIndex(of: key) {
order.remove(at: index)
order.append(key)
return cache[key]
} else {
return nil
}
}
set {
if let index = order.firstIndex(of: key) {
order.remove(at: index)
order.append(key)
cache[key] = newValue
} else {
if order.count == capacity {
cache.removeValue(forKey: order.first!)
order.removeFirst()
}
order.append(key)
cache[key] = newValue
}
}
}
}
```protocol CacheProtocol {
associatedtype Key: Hashable
associatedtype Element
init(capacity: Int)
subscript(key: Key) -> Element? { get set }
}
class Cache<Key: Hashable, Element>: CacheProtocol {
private var capacity: Int
private var cache: [Key: Element] = [:]
private var order: [Key] = []
required init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
guard let index = order.firstIndex(of: key) else {
return nil
}
order.remove(at: index)
order.append(key)
return cache[key]
}
set {
guard let index = order.firstIndex(of: key) else {
if order.count == capacity {
order.removeFirst()
}
order.append(key)
cache[key] = newValue
return
}
order.remove(at: index)
order.append(key)
cache[key] = newValue
}
}
}
class DiskCache<Key: Hashable, Element>: CacheProtocol {
private var capacity: Int
private var cache: [Key: Element] = [:]
private var order: [Key] = []
required init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
guard let index = order.firstIndex(of: key) else {
return nil
}
order.remove(at: index)
order.append(key)
return cache[key]
}
set {
guard let index = order.firstIndex(of: key) else {
if order.count == capacity {
order.removeFirst()
}
order.append(key)
cache[key] = newValue
return
}
order.remove(at: index)
order.append(key)
cache[key] = newValue
}
}
}```swift
protocol CacheProtocol {
associatedtype Key: Hashable
associatedtype Element
init(capacity: Int)
subscript(key: Key) -> Element? { get set }
}
// Generic in-memory cache that follows to the LRU (Least Recently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least recently used item to make space for new entries.
class Cache<Key: Hashable, Element>: CacheProtocol {
private var capacity: Int
private var cache: [Key: Element] = [:]
private var order: [Key] = []
required init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
guard let index = order.firstIndex(of: key) else {
return nil
}
order.remove(at: index)
order.append(key)
return cache[key]
}
set {
guard let index = order.firstIndex(of: key) else {
if order.count == capacity {
order.removeFirst()
}
order.append(key)
cache[key] = newValue
return
}
order.remove(at: index)
order.append(key)
cache[key] = newValue
}
}
}
// Generic on-disk cache that follows to the LRU (Least Recently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least recently used item to make space for new entries.
// The cache should also be able to persist its contents to disk.
class DiskCache<Key: Hashable, Element>: CacheProtocol {
private var capacity: Int
private var cache: [Key: Element] = [:]
private var order: [Key] = []
required init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
guard let index = order.firstIndex(of: key) else {
return nil
}
order.remove(at: index)
order.append(key)
return cache[key]
}
set {
guard let index = order.firstIndex(of: key) else {
if order.count == capacity {
order.removeFirst()
}
order.append(key)
cache[key] = newValue
return
}
order.remove(at: index)
order.append(key)
cache[key] = newValue
}
}
}
```protocol CacheProtocol {
associatedtype Key: Hashable
associatedtype Element
init(capacity: Int)
subscript(key: Key) -> Element? { get set }
}
class Cache<Key: Hashable, Element>: CacheProtocol {
typealias Key = Key
typealias Element = Element
private var capacity: Int
private var cache: [Key: Element] = [:]
private var order: [Key] = []
required init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let index = order.firstIndex(of: key) {
order.remove(at: index)
order.append(key)
return cache[key]
}
return nil
}
set {
if let index = order.firstIndex(of: key) {
order.remove(at: index)
order.append(key)
cache[key] = newValue
} else {
if order.count == capacity {
let keyToRemove = order.removeFirst()
cache[keyToRemove] = nil
}
order.append(key)
cache[key] = newValue
}
}
}
}
class DiskCache<Key: Hashable, Element>: CacheProtocol {
typealias Key = Key
typealias Element = Element
private var capacity: Int
private var cache: [Key: Element] = [:]
private var order: [Key] = []
required init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let index = order.firstIndex(of: key) {
order.remove(at: index)
order.append(key)
return cache[key]
}
return nil
}
set {
if let index = order.firstIndex(of: key) {
order.remove(at: index)
order.append(key)
cache[key] = newValue
} else {
if order.count == capacity {
let keyToRemove = order.removeFirst()
cache[keyToRemove] = nil
}
order.append(key)
cache[key] = newValue
}
}
}
}```swift
protocol CacheProtocol {
associatedtype Key: Hashable
associatedtype Element
init(capacity: Int)
subscript(key: Key) -> Element? { get set }
}
// Generic in-memory cache that follows to the LRU (Least Recently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least recently used item to make space for new entries.
class Cache<Key: Hashable, Element>: CacheProtocol {
typealias Key = Key
typealias Element = Element
private var capacity: Int
private var cache: [Key: Element] = [:]
private var order: [Key] = []
required init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let index = order.firstIndex(of: key) {
order.remove(at: index)
order.append(key)
return cache[key]
}
return nil
}
set {
if let index = order.firstIndex(of: key) {
order.remove(at: index)
order.append(key)
cache[key] = newValue
} else {
if order.count == capacity {
let keyToRemove = order.removeFirst()
cache[keyToRemove] = nil
}
order.append(key)
cache[key] = newValue
}
}
}
}
// Generic disk-based cache that follows to the LRU (Least Recently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least recently used item to make space for new entries.
class DiskCache<Key: Hashable, Element>: CacheProtocol {
typealias Key = Key
typealias Element = Element
private var capacity: Int
private var cache: [Key: Element] = [:]
private var order: [Key] = []
required init(capacity: Int) {
self.capacity = capacity
}
subscript(key: Key) -> Element? {
get {
if let index = order.firstIndex(of: key) {
order.remove(at: index)
order.append(key)
return cache[key]
}
return nil
}
set {
if let index = order.firstIndex(of: key) {
order.remove(at: index)
order.append(key)
cache[key] = newValue
} else {
if order.count == capacity {
let keyToRemove = order.removeFirst()
cache[keyToRemove] = nil
}
order.append(key)
cache[key] = newValue
}
}
}
}
```protocol ExpirableCacheProtocol {
associatedtype Key: Hashable
associatedtype Value
func put(value: Value, key: Key, expiration: TimeInterval)
func get(key: Key) -> Value?
}
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache: [Key: (Value, Date)] = [:]
private let expiration: TimeInterval
private let queue: DispatchQueue
init(expiration: TimeInterval, queue: DispatchQueue = DispatchQueue.global()) {
self.expiration = expiration
self.queue = queue
}
func put(value: Value, key: Key, expiration: TimeInterval) {
queue.async {
self.cache[key] = (value, Date(timeIntervalSinceNow: expiration))
}
}
func get(key: Key) -> Value? {
queue.sync {
guard let (value, expirationDate) = cache[key] else {
return nil
}
if expirationDate < Date() {
cache[key] = nil
return nil
}
return value
}
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
}
set {
guard let value = newValue else {
return
}
put(value: value, key: key, expiration: expiration)
}
}
}
class ExpirableCache2<Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache: [Key: (Value, Date)] = [:]
private let expiration: TimeInterval
private let queue: DispatchQueue
init(expiration: TimeInterval, queue: DispatchQueue = DispatchQueue.global()) {
self.expiration = expiration
self.queue = queue
}
func put(value: Value, key: Key, expiration: TimeInterval) {
queue.async {
self.cache[key] = (value, Date(timeIntervalSinceNow: expiration))
}
}
func get(key: Key) -> Value? {
queue.sync {
guard let (value, expirationDate) = cache[key] else {
return nil
}
if expirationDate < Date() {
cache[key] = nil
return nil
}
return value
}
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
}
set {
guard let value = newValue else {
return
}
put(value: value, key: key, expiration: expiration)
}
}
}```swift
protocol ExpirableCacheProtocol {
associatedtype Key: Hashable
associatedtype Value
func put(value: Value, key: Key, expiration: TimeInterval)
func get(key: Key) -> Value?
}
// Caching mechanism with expiration eviction policy.
// Subscript methods used for convenient access.
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache: [Key: (Value, Date)] = [:]
private let expiration: TimeInterval
private let queue: DispatchQueue
init(expiration: TimeInterval, queue: DispatchQueue = DispatchQueue.global()) {
self.expiration = expiration
self.queue = queue
}
func put(value: Value, key: Key, expiration: TimeInterval) {
queue.async {
self.cache[key] = (value, Date(timeIntervalSinceNow: expiration))
}
}
func get(key: Key) -> Value? {
queue.sync {
guard let (value, expirationDate) = cache[key] else {
return nil
}
if expirationDate < Date() {
cache[key] = nil
return nil
}
return value
}
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
}
set {
guard let value = newValue else {
return
}
put(value: value, key: key, expiration: expiration)
}
}
}
// Caching mechanism with expiration eviction policy.
// Subscript methods used for convenient access.
class ExpirableCache2<Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache: [Key: (Value, Date)] = [:]
private let expiration: TimeInterval
private let queue: DispatchQueue
init(expiration: TimeInterval, queue: DispatchQueue = DispatchQueue.global()) {
self.expiration = expiration
self.queue = queue
}
func put(value: Value, key: Key, expiration: TimeInterval) {
queue.async {
self.cache[key] = (value, Date(timeIntervalSinceNow: expiration))
}
}
func get(key: Key) -> Value? {
queue.sync {
guard let (value, expirationDate) = cache[key] else {
return nil
}
if expirationDate < Date() {
cache[key] = nil
return nil
}
return value
}
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
}
set {
guard let value = newValue else {
return
}
put(value: value, key: key, expiration: expiration)
}
}
}
```let cache = ExpirableCache<String, String>() // missing argument for parameter 'expiration' in callThread.sleep(forTimeInterval: 1.1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6Thread.sleep(forTimeInterval: 0.9) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6protocol ExpirableCacheProtocol {
associatedtype Key: Hashable
associatedtype Value
func put(value: Value, key: Key, expiration: TimeInterval)
func get(key: Key) -> Value?
}
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache: [Key: (Value, TimeInterval)] = [:]
private var expirationQueue: DispatchQueue = DispatchQueue(label: "com.cache.expirationQueue")
private var expirationTimer: DispatchSourceTimer?
private var expirationInterval: TimeInterval = 0
init(expirationInterval: TimeInterval) {
self.expirationInterval = expirationInterval
self.expirationTimer = DispatchSource.makeTimerSource(flags: [], queue: self.expirationQueue)
self.expirationTimer?.schedule(deadline:.now(), repeating: self.expirationInterval)
self.expirationTimer?.setEventHandler { [weak self] in
self?.expirationQueue.async {
self?.expirationTimer?.suspend()
self?.expirationQueue.sync {
self?.cache.removeExpired()
self?.expirationTimer?.resume()
}
}
}
self.expirationTimer?.resume()
}
func put(value: Value, key: Key, expiration: TimeInterval) {
self.cache[key] = (value, expiration)
}
func get(key: Key) -> Value? {
guard let (value, _) = self.cache[key] else { return nil }
return value
}
subscript(key: Key) -> Value? {
get {
return self.get(key: key)
}
set {
guard let value = newValue else { return }
self.put(value: value, key: key, expiration: self.expirationInterval)
}
}
}
extension ExpirableCache {
private func removeExpired() {
self.cache.removeExpired()
}
}
extension Dictionary where Key: Hashable, Value == (Value, TimeInterval) {
mutating func removeExpired() {
self.removeExpired(expiration: Date())
}
mutating func removeExpired(expiration: Date) {
self.remove(where: { (_, expiration) in expiration < expiration.timeIntervalSince1970 })
}
}```swift
protocol ExpirableCacheProtocol {
associatedtype Key: Hashable
associatedtype Value
func put(value: Value, key: Key, expiration: TimeInterval)
func get(key: Key) -> Value?
}
// Caching mechanism with expiration eviction policy.
// Subscript methods used for convenient access.
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache: [Key: (Value, TimeInterval)] = [:]
private var expirationQueue: DispatchQueue = DispatchQueue(label: "com.cache.expirationQueue")
private var expirationTimer: DispatchSourceTimer?
private var expirationInterval: TimeInterval = 0
init(expirationInterval: TimeInterval) {
self.expirationInterval = expirationInterval
self.expirationTimer = DispatchSource.makeTimerSource(flags: [], queue: self.expirationQueue)
self.expirationTimer?.schedule(deadline:.now(), repeating: self.expirationInterval)
self.expirationTimer?.setEventHandler { [weak self] in
self?.expirationQueue.async {
self?.expirationTimer?.suspend()
self?.expirationQueue.sync {
self?.cache.removeExpired()
self?.expirationTimer?.resume()
}
}
}
self.expirationTimer?.resume()
}
func put(value: Value, key: Key, expiration: TimeInterval) {
self.cache[key] = (value, expiration)
}
func get(key: Key) -> Value? {
guard let (value, _) = self.cache[key] else { return nil }
return value
}
subscript(key: Key) -> Value? {
get {
return self.get(key: key)
}
set {
guard let value = newValue else { return }
self.put(value: value, key: key, expiration: self.expirationInterval)
}
}
}
extension ExpirableCache {
private func removeExpired() {
self.cache.removeExpired()
}
}
extension Dictionary where Key: Hashable, Value == (Value, TimeInterval) {
mutating func removeExpired() {
self.removeExpired(expiration: Date())
}
mutating func removeExpired(expiration: Date) {
self.remove(where: { (_, expiration) in expiration < expiration.timeIntervalSince1970 })
}
}
```extension Dictionary where Key: Hashable, Value == (Value, TimeInterval) { // cannot build rewrite system for generic signature; concrete nesting limit exceededself.remove(where: { (_, expiration) in expiration < expiration.timeIntervalSince1970 }) // incorrect argument label in call (have 'where:', expected 'at:')self.remove(where: { (_, expiration) in expiration < expiration.timeIntervalSince1970 }) // cannot convert value of type '(_, _) -> Bool' to expected argument type 'Dictionary<Key, Value>.Index'let cache = ExpirableCache<String, String>() // missing argument for parameter 'expirationInterval' in callThread.sleep(forTimeInterval: 1.1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6Thread.sleep(forTimeInterval: 0.9) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6protocol ExpirableCacheProtocol {
associatedtype Key: Hashable
associatedtype Value
func put(value: Value, key: Key, expiration: TimeInterval)
func get(key: Key) -> Value?
}
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
typealias CacheEntry = (value: Value, expiration: TimeInterval)
private var cache: [Key: CacheEntry] = [:]
private var expirationQueue: DispatchQueue = DispatchQueue(label: "com.cache.expiration")
private var expirationTimer: Timer?
func put(value: Value, key: Key, expiration: TimeInterval) {
expirationQueue.async {
self.cache[key] = (value, expiration)
self.startExpirationTimer()
}
}
func get(key: Key) -> Value? {
expirationQueue.sync {
guard let entry = cache[key] else { return nil }
if entry.expiration < Date().timeIntervalSince1970 {
cache.removeValue(forKey: key)
return nil
}
return entry.value
}
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
}
set {
if let value = newValue {
put(value: value, key: key, expiration: 10)
} else {
cache.removeValue(forKey: key)
}
}
}
private func startExpirationTimer() {
if expirationTimer == nil {
expirationTimer = Timer.scheduledTimer(withTimeInterval: 1, repeats: true, block: { [weak self] _ in
self?.expirationQueue.sync {
self?.cache.removeValues(where: { $0.value.expiration < Date().timeIntervalSince1970 })
}
})
}
}
}```swift
protocol ExpirableCacheProtocol {
associatedtype Key: Hashable
associatedtype Value
func put(value: Value, key: Key, expiration: TimeInterval)
func get(key: Key) -> Value?
}
// Caching mechanism with expiration eviction policy.
// Subscript methods used for convenient access.
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
typealias CacheEntry = (value: Value, expiration: TimeInterval)
private var cache: [Key: CacheEntry] = [:]
private var expirationQueue: DispatchQueue = DispatchQueue(label: "com.cache.expiration")
private var expirationTimer: Timer?
func put(value: Value, key: Key, expiration: TimeInterval) {
expirationQueue.async {
self.cache[key] = (value, expiration)
self.startExpirationTimer()
}
}
func get(key: Key) -> Value? {
expirationQueue.sync {
guard let entry = cache[key] else { return nil }
if entry.expiration < Date().timeIntervalSince1970 {
cache.removeValue(forKey: key)
return nil
}
return entry.value
}
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
}
set {
if let value = newValue {
put(value: value, key: key, expiration: 10)
} else {
cache.removeValue(forKey: key)
}
}
}
private func startExpirationTimer() {
if expirationTimer == nil {
expirationTimer = Timer.scheduledTimer(withTimeInterval: 1, repeats: true, block: { [weak self] _ in
self?.expirationQueue.sync {
self?.cache.removeValues(where: { $0.value.expiration < Date().timeIntervalSince1970 })
}
})
}
}
}
// Usage example
let cache = ExpirableCache<String, String>()
cache["key"] = "value"
print(cache["key"])
```self?.cache.removeValues(where: { $0.value.expiration < Date().timeIntervalSince1970 }) // value of type '[Key : (value: Value, expiration: TimeInterval)]' (aka 'Dictionary<Key, (value: Value, expiration: Double)>') has no member 'removeValues'Thread.sleep(forTimeInterval: 1.1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6Thread.sleep(forTimeInterval: 0.9) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6protocol ExpirableCacheProtocol {
associatedtype Key: Hashable
associatedtype Value
func put(value: Value, key: Key, expiration: TimeInterval)
func get(key: Key) -> Value?
}
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache: [Key: (Value, TimeInterval)] = [:]
private var expirationQueue: DispatchQueue = DispatchQueue(label: "com.cache.expiration")
func put(value: Value, key: Key, expiration: TimeInterval) {
expirationQueue.async {
self.cache[key] = (value, expiration)
}
}
func get(key: Key) -> Value? {
var result: Value?
expirationQueue.sync {
result = cache[key]?.0
}
return result
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
}
set {
if let value = newValue {
put(value: value, key: key, expiration: 10)
} else {
expirationQueue.sync {
cache.removeValue(forKey: key)
}
}
}
}
}```swift
protocol ExpirableCacheProtocol {
associatedtype Key: Hashable
associatedtype Value
func put(value: Value, key: Key, expiration: TimeInterval)
func get(key: Key) -> Value?
}
// Caching mechanism with expiration eviction policy.
// Subscript methods used for convenient access.
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache: [Key: (Value, TimeInterval)] = [:]
private var expirationQueue: DispatchQueue = DispatchQueue(label: "com.cache.expiration")
func put(value: Value, key: Key, expiration: TimeInterval) {
expirationQueue.async {
self.cache[key] = (value, expiration)
}
}
func get(key: Key) -> Value? {
var result: Value?
expirationQueue.sync {
result = cache[key]?.0
}
return result
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
}
set {
if let value = newValue {
put(value: value, key: key, expiration: 10)
} else {
expirationQueue.sync {
cache.removeValue(forKey: key)
}
}
}
}
}
```expirationQueue.sync { // result of call to 'sync(execute:)' is unusedThread.sleep(forTimeInterval: 1.1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6Thread.sleep(forTimeInterval: 0.9) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6 // XCTAssertNil failed: expression is not nilprotocol ExpirableCacheProtocol {
associatedtype Key: Hashable
associatedtype Value
func put(value: Value, key: Key, expiration: TimeInterval)
func get(key: Key) -> Value?
}
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache: [Key: (Value, TimeInterval)] = [:]
private var expirationQueue: DispatchQueue = DispatchQueue(label: "com.expirableCache.expirationQueue")
private var expirationTimer: Timer?
func put(value: Value, key: Key, expiration: TimeInterval) {
expirationQueue.async {
self.cache[key] = (value, expiration)
self.startExpirationTimer()
}
}
func get(key: Key) -> Value? {
expirationQueue.sync {
return cache[key]?.0
}
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
}
set {
if let value = newValue {
put(value: value, key: key, expiration: 10)
} else {
remove(key: key)
}
}
}
private func remove(key: Key) {
expirationQueue.async {
self.cache[key] = nil
}
}
private func startExpirationTimer() {
if expirationTimer == nil {
expirationTimer = Timer.scheduledTimer(withTimeInterval: 1, repeats: true) { [weak self] _ in
self?.expirationQueue.async {
self?.removeExpiredItems()
}
}
}
}
private func removeExpiredItems() {
let now = Date().timeIntervalSince1970
cache = cache.filter { (_, value) -> Bool in
return value.1 > now
}
}
}```swift
protocol ExpirableCacheProtocol {
associatedtype Key: Hashable
associatedtype Value
func put(value: Value, key: Key, expiration: TimeInterval)
func get(key: Key) -> Value?
}
// Caching mechanism with expiration eviction policy.
// Subscript methods used for convenient access.
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache: [Key: (Value, TimeInterval)] = [:]
private var expirationQueue: DispatchQueue = DispatchQueue(label: "com.expirableCache.expirationQueue")
private var expirationTimer: Timer?
func put(value: Value, key: Key, expiration: TimeInterval) {
expirationQueue.async {
self.cache[key] = (value, expiration)
self.startExpirationTimer()
}
}
func get(key: Key) -> Value? {
expirationQueue.sync {
return cache[key]?.0
}
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
}
set {
if let value = newValue {
put(value: value, key: key, expiration: 10)
} else {
remove(key: key)
}
}
}
private func remove(key: Key) {
expirationQueue.async {
self.cache[key] = nil
}
}
private func startExpirationTimer() {
if expirationTimer == nil {
expirationTimer = Timer.scheduledTimer(withTimeInterval: 1, repeats: true) { [weak self] _ in
self?.expirationQueue.async {
self?.removeExpiredItems()
}
}
}
}
private func removeExpiredItems() {
let now = Date().timeIntervalSince1970
cache = cache.filter { (_, value) -> Bool in
return value.1 > now
}
}
}
// Usage example
let cache = ExpirableCache<String, String>()
cache["key"] = "value"
cache["key"] = nil
cache["key"] = "value"
```Thread.sleep(forTimeInterval: 1.1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6Thread.sleep(forTimeInterval: 0.9) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6 // XCTAssertNil failed: expression is not nilprotocol ExpirableCacheProtocol {
associatedtype Key: Hashable
associatedtype Value
func put(value: Value, key: Key, expiration: TimeInterval)
func get(key: Key) -> Value?
}
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache: [Key: CacheItem<Value>] = [:]
private var queue: DispatchQueue = DispatchQueue(label: "com.cache.queue")
private var expirationQueue: DispatchQueue = DispatchQueue(label: "com.cache.expiration.queue")
private var expirationTimer: Timer?
func put(value: Value, key: Key, expiration: TimeInterval) {
queue.async {
self.cache[key] = CacheItem(value: value, expiration: expiration)
self.expirationTimer?.invalidate()
self.expirationTimer = Timer.scheduledTimer(withTimeInterval: expiration, repeats: false, block: { [weak self] _ in
self?.queue.async {
self?.cache.removeValue(forKey: key)
}
})
}
}
func get(key: Key) -> Value? {
return queue.sync {
if let item = cache[key] {
if item.expiration < Date().timeIntervalSince1970 {
cache.removeValue(forKey: key)
return nil
}
return item.value
}
return nil
}
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
}
set {
if let value = newValue {
put(value: value, key: key, expiration: 10)
}
}
}
}
private struct CacheItem<Value> {
let value: Value
let expiration: TimeInterval
}```swift
protocol ExpirableCacheProtocol {
associatedtype Key: Hashable
associatedtype Value
func put(value: Value, key: Key, expiration: TimeInterval)
func get(key: Key) -> Value?
}
// Caching mechanism with expiration eviction policy.
// Subscript methods used for convenient access.
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache: [Key: CacheItem<Value>] = [:]
private var queue: DispatchQueue = DispatchQueue(label: "com.cache.queue")
private var expirationQueue: DispatchQueue = DispatchQueue(label: "com.cache.expiration.queue")
private var expirationTimer: Timer?
func put(value: Value, key: Key, expiration: TimeInterval) {
queue.async {
self.cache[key] = CacheItem(value: value, expiration: expiration)
self.expirationTimer?.invalidate()
self.expirationTimer = Timer.scheduledTimer(withTimeInterval: expiration, repeats: false, block: { [weak self] _ in
self?.queue.async {
self?.cache.removeValue(forKey: key)
}
})
}
}
func get(key: Key) -> Value? {
return queue.sync {
if let item = cache[key] {
if item.expiration < Date().timeIntervalSince1970 {
cache.removeValue(forKey: key)
return nil
}
return item.value
}
return nil
}
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
}
set {
if let value = newValue {
put(value: value, key: key, expiration: 10)
}
}
}
}
// Cache item with expiration time.
private struct CacheItem<Value> {
let value: Value
let expiration: TimeInterval
}
```Thread.sleep(forTimeInterval: 1.1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6Thread.sleep(forTimeInterval: 0.9) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6 // XCTAssertEqual failed: (nil) is not equal to (Optional("Hello, SwiftEval!"))protocol ExpirableCacheProtocol {
associatedtype Key: Hashable
associatedtype Value
func put(value: Value, key: Key, expiration: TimeInterval)
func get(key: Key) -> Value?
}
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache: [Key: (Value, TimeInterval)] = [:]
private var expirationQueue: [Key: TimeInterval] = [:]
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, expiration)
expirationQueue[key] = expiration
}
func get(key: Key) -> Value? {
if let (value, expiration) = cache[key] {
if expiration < Date().timeIntervalSince1970 {
cache.removeValue(forKey: key)
expirationQueue.removeValue(forKey: key)
return nil
}
return value
}
return nil
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
}
set {
if let value = newValue {
put(value: value, key: key, expiration: Date().timeIntervalSince1970 + 10)
}
}
}
}```swift
protocol ExpirableCacheProtocol {
associatedtype Key: Hashable
associatedtype Value
func put(value: Value, key: Key, expiration: TimeInterval)
func get(key: Key) -> Value?
}
// Caching mechanism with expiration eviction policy.
// Subscript methods used for convenient access.
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache: [Key: (Value, TimeInterval)] = [:]
private var expirationQueue: [Key: TimeInterval] = [:]
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, expiration)
expirationQueue[key] = expiration
}
func get(key: Key) -> Value? {
if let (value, expiration) = cache[key] {
if expiration < Date().timeIntervalSince1970 {
cache.removeValue(forKey: key)
expirationQueue.removeValue(forKey: key)
return nil
}
return value
}
return nil
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
}
set {
if let value = newValue {
put(value: value, key: key, expiration: Date().timeIntervalSince1970 + 10)
}
}
}
}
// Usage example.
let cache = ExpirableCache<String, String>()
cache["key"] = "value"
print(cache["key"])
```Thread.sleep(forTimeInterval: 1.1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6Thread.sleep(forTimeInterval: 0.9) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6 // XCTAssertEqual failed: (nil) is not equal to (Optional("Hello, SwiftEval!"))protocol ExpirableCacheProtocol {
associatedtype Key: Hashable
associatedtype Value
func put(value: Value, key: Key, expiration: TimeInterval)
func get(key: Key) -> Value?
}
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache: [Key: Value] = [:]
private var expiration: TimeInterval = 0
private var expirationQueue: DispatchQueue = DispatchQueue(label: "com.expirableCache.expirationQueue")
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = value
self.expiration = expiration
expirationQueue.asyncAfter(deadline:.now() + expiration) { [weak self] in
self?.cache.removeValue(forKey: key)
}
}
func get(key: Key) -> Value? {
return cache[key]
}
subscript(key: Key) -> Value? {
get {
return cache[key]
}
set {
if let value = newValue {
put(value: value, key: key, expiration: expiration)
} else {
cache.removeValue(forKey: key)
}
}
}
}```swift
protocol ExpirableCacheProtocol {
associatedtype Key: Hashable
associatedtype Value
func put(value: Value, key: Key, expiration: TimeInterval)
func get(key: Key) -> Value?
}
// Caching mechanism with expiration eviction policy.
// Subscript methods used for convenient access.
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache: [Key: Value] = [:]
private var expiration: TimeInterval = 0
private var expirationQueue: DispatchQueue = DispatchQueue(label: "com.expirableCache.expirationQueue")
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = value
self.expiration = expiration
expirationQueue.asyncAfter(deadline:.now() + expiration) { [weak self] in
self?.cache.removeValue(forKey: key)
}
}
func get(key: Key) -> Value? {
return cache[key]
}
subscript(key: Key) -> Value? {
get {
return cache[key]
}
set {
if let value = newValue {
put(value: value, key: key, expiration: expiration)
} else {
cache.removeValue(forKey: key)
}
}
}
}
```Thread.sleep(forTimeInterval: 1.1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6Thread.sleep(forTimeInterval: 0.9) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6protocol ExpirableCacheProtocol {
associatedtype Key: Hashable
associatedtype Value
func put(value: Value, key: Key, expiration: TimeInterval)
func get(key: Key) -> Value?
}
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache: [Key: (Value, TimeInterval)] = [:]
private var expirationQueue: [Key: TimeInterval] = [:]
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, expiration)
expirationQueue[key] = expiration
}
func get(key: Key) -> Value? {
if let (value, expiration) = cache[key] {
if expiration > Date().timeIntervalSince1970 {
return value
} else {
cache.removeValue(forKey: key)
expirationQueue.removeValue(forKey: key)
}
}
return nil
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
}
set {
if let value = newValue {
put(value: value, key: key, expiration: Date().timeIntervalSince1970 + 60)
} else {
cache.removeValue(forKey: key)
expirationQueue.removeValue(forKey: key)
}
}
}
}
class ExpirableCache2<Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache: [Key: (Value, TimeInterval)] = [:]
private var expirationQueue: [Key: TimeInterval] = [:]
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, expiration)
expirationQueue[key] = expiration
}
func get(key: Key) -> Value? {
if let (value, expiration) = cache[key] {
if expiration > Date().timeIntervalSince1970 {
return value
} else {
cache.removeValue(forKey: key)
expirationQueue.removeValue(forKey: key)
}
}
return nil
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
}
set {
if let value = newValue {
put(value: value, key: key, expiration: Date().timeIntervalSince1970 + 60)
} else {
cache.removeValue(forKey: key)
expirationQueue.removeValue(forKey: key)
}
}
}
}```swift
protocol ExpirableCacheProtocol {
associatedtype Key: Hashable
associatedtype Value
func put(value: Value, key: Key, expiration: TimeInterval)
func get(key: Key) -> Value?
}
// Caching mechanism with expiration eviction policy.
// Subscript methods used for convenient access.
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache: [Key: (Value, TimeInterval)] = [:]
private var expirationQueue: [Key: TimeInterval] = [:]
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, expiration)
expirationQueue[key] = expiration
}
func get(key: Key) -> Value? {
if let (value, expiration) = cache[key] {
if expiration > Date().timeIntervalSince1970 {
return value
} else {
cache.removeValue(forKey: key)
expirationQueue.removeValue(forKey: key)
}
}
return nil
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
}
set {
if let value = newValue {
put(value: value, key: key, expiration: Date().timeIntervalSince1970 + 60)
} else {
cache.removeValue(forKey: key)
expirationQueue.removeValue(forKey: key)
}
}
}
}
// Caching mechanism with expiration eviction policy.
// Subscript methods used for convenient access.
class ExpirableCache2<Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache: [Key: (Value, TimeInterval)] = [:]
private var expirationQueue: [Key: TimeInterval] = [:]
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, expiration)
expirationQueue[key] = expiration
}
func get(key: Key) -> Value? {
if let (value, expiration) = cache[key] {
if expiration > Date().timeIntervalSince1970 {
return value
} else {
cache.removeValue(forKey: key)
expirationQueue.removeValue(forKey: key)
}
}
return nil
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
}
set {
if let value = newValue {
put(value: value, key: key, expiration: Date().timeIntervalSince1970 + 60)
} else {
cache.removeValue(forKey: key)
expirationQueue.removeValue(forKey: key)
}
}
}
}
```Thread.sleep(forTimeInterval: 1.1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6Thread.sleep(forTimeInterval: 0.9) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6 // XCTAssertEqual failed: (nil) is not equal to (Optional("Hello, SwiftEval!"))protocol ExpirableCacheProtocol {
associatedtype Key: Hashable
associatedtype Value
func put(value: Value, key: Key, expiration: TimeInterval)
func get(key: Key) -> Value?
}
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache: [Key: (Value, TimeInterval)] = [:]
private var expirationQueue: [Key: TimeInterval] = [:]
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, expiration)
expirationQueue[key] = expiration
}
func get(key: Key) -> Value? {
if let (value, expiration) = cache[key] {
if expiration > Date().timeIntervalSince1970 {
return value
}
}
return nil
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
}
set {
if let value = newValue {
put(value: value, key: key, expiration: Date().timeIntervalSince1970 + 10)
}
}
}
}```swift
protocol ExpirableCacheProtocol {
associatedtype Key: Hashable
associatedtype Value
func put(value: Value, key: Key, expiration: TimeInterval)
func get(key: Key) -> Value?
}
// Caching mechanism with expiration eviction policy.
// Subscript methods used for convenient access.
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
private var cache: [Key: (Value, TimeInterval)] = [:]
private var expirationQueue: [Key: TimeInterval] = [:]
func put(value: Value, key: Key, expiration: TimeInterval) {
cache[key] = (value, expiration)
expirationQueue[key] = expiration
}
func get(key: Key) -> Value? {
if let (value, expiration) = cache[key] {
if expiration > Date().timeIntervalSince1970 {
return value
}
}
return nil
}
subscript(key: Key) -> Value? {
get {
return get(key: key)
}
set {
if let value = newValue {
put(value: value, key: key, expiration: Date().timeIntervalSince1970 + 10)
}
}
}
}
// Usage example
let cache = ExpirableCache<String, String>()
cache["key"] = "value"
print(cache["key"])
```Thread.sleep(forTimeInterval: 1.1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6Thread.sleep(forTimeInterval: 0.9) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6 // XCTAssertEqual failed: (nil) is not equal to (Optional("Hello, SwiftEval!"))protocol EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data
func decrypt(_ data: Data, _ key: String) -> String
}
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
return Data(string.utf8.map { $0 ^ key.utf8.first! })
}
func decrypt(_ data: Data, _ key: String) -> String {
return String(data: data.map { $0 ^ key.utf8.first! }, encoding:.utf8)!
}
}```swift
protocol EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data
func decrypt(_ data: Data, _ key: String) -> String
}
// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
return Data(string.utf8.map { $0 ^ key.utf8.first! })
}
func decrypt(_ data: Data, _ key: String) -> String {
return String(data: data.map { $0 ^ key.utf8.first! }, encoding:.utf8)!
}
}
```return String(data: data.map { $0 ^ key.utf8.first! }, encoding:.utf8)! // cannot convert value of type '[UInt8]' to expected argument type 'Data'protocol EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data
func decrypt(_ data: Data, _ key: String) -> String
}
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let plainText = string.data(using:.utf8)!
let keyData = key.data(using:.utf8)!
let encryptedData = plainText.xor(keyData)
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
let decryptedData = data.xor(keyData)
let decryptedString = String(data: decryptedData, encoding:.utf8)!
return decryptedString
}
}```swift
protocol EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data
func decrypt(_ data: Data, _ key: String) -> String
}
// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let plainText = string.data(using:.utf8)!
let keyData = key.data(using:.utf8)!
let encryptedData = plainText.xor(keyData)
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
let decryptedData = data.xor(keyData)
let decryptedString = String(data: decryptedData, encoding:.utf8)!
return decryptedString
}
}
```let encryptedData = plainText.xor(keyData) // value of type 'Data' has no member 'xor'let decryptedData = data.xor(keyData) // value of type 'Data' has no member 'xor'protocol EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data
func decrypt(_ data: Data, _ key: String) -> String
}
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let keyData = key.data(using:.utf8)!
let stringData = string.data(using:.utf8)!
let encryptedData = Data(count: stringData.count)
var index = 0
for byte in stringData {
let keyByte = keyData[index % keyData.count]
let encryptedByte = byte ^ keyByte
encryptedData[index] = encryptedByte
index += 1
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
let decryptedData = Data(count: data.count)
var index = 0
for byte in data {
let keyByte = keyData[index % keyData.count]
let decryptedByte = byte ^ keyByte
decryptedData[index] = decryptedByte
index += 1
}
return String(data: decryptedData, encoding:.utf8)!
}
}```swift
protocol EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data
func decrypt(_ data: Data, _ key: String) -> String
}
// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let keyData = key.data(using:.utf8)!
let stringData = string.data(using:.utf8)!
let encryptedData = Data(count: stringData.count)
var index = 0
for byte in stringData {
let keyByte = keyData[index % keyData.count]
let encryptedByte = byte ^ keyByte
encryptedData[index] = encryptedByte
index += 1
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
let decryptedData = Data(count: data.count)
var index = 0
for byte in data {
let keyByte = keyData[index % keyData.count]
let decryptedByte = byte ^ keyByte
decryptedData[index] = decryptedByte
index += 1
}
return String(data: decryptedData, encoding:.utf8)!
}
}
```encryptedData[index] = encryptedByte // cannot assign through subscript: 'encryptedData' is a 'let' constantdecryptedData[index] = decryptedByte // cannot assign through subscript: 'decryptedData' is a 'let' constantprotocol EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data
func decrypt(_ data: Data, _ key: String) -> String
}
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let data = string.data(using:.utf8)!
let keyData = key.data(using:.utf8)!
let encryptedData = data.xor(keyData)
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
let decryptedData = data.xor(keyData)
let decryptedString = String(data: decryptedData, encoding:.utf8)!
return decryptedString
}
}```swift
protocol EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data
func decrypt(_ data: Data, _ key: String) -> String
}
// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let data = string.data(using:.utf8)!
let keyData = key.data(using:.utf8)!
let encryptedData = data.xor(keyData)
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
let decryptedData = data.xor(keyData)
let decryptedString = String(data: decryptedData, encoding:.utf8)!
return decryptedString
}
}
// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let data = string.data(using:.utf8)!
let keyData = key.data(using:.utf8)!
let encryptedData = data.xor(keyData)
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
let decryptedData = data.xor(keyData)
let decryptedString = String(data: decryptedData, encoding:.utf8)!
return decryptedString
}
}
```let encryptedData = data.xor(keyData) // value of type 'Data' has no member 'xor'let decryptedData = data.xor(keyData) // value of type 'Data' has no member 'xor'protocol EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data
func decrypt(_ data: Data, _ key: String) -> String
}
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let keyData = key.data(using:.utf8)!
let stringData = string.data(using:.utf8)!
var encryptedData = Data(count: stringData.count)
for i in 0..<stringData.count {
encryptedData[i] = stringData[i] ^ keyData[i % keyData.count]
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
var decryptedData = Data(count: data.count)
for i in 0..<data.count {
decryptedData[i] = data[i] ^ keyData[i % keyData.count]
}
return String(data: decryptedData, encoding:.utf8)!
}
}```swift
protocol EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data
func decrypt(_ data: Data, _ key: String) -> String
}
// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let keyData = key.data(using:.utf8)!
let stringData = string.data(using:.utf8)!
var encryptedData = Data(count: stringData.count)
for i in 0..<stringData.count {
encryptedData[i] = stringData[i] ^ keyData[i % keyData.count]
}
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
var decryptedData = Data(count: data.count)
for i in 0..<data.count {
decryptedData[i] = data[i] ^ keyData[i % keyData.count]
}
return String(data: decryptedData, encoding:.utf8)!
}
}
```protocol EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data
func decrypt(_ data: Data, _ key: String) -> String
}
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let data = string.data(using:.utf8)!
let keyData = key.data(using:.utf8)!
let encryptedData = data.map { $0 ^ keyData.first! }
return Data(encryptedData)
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
let decryptedData = data.map { $0 ^ keyData.first! }
return String(data: Data(decryptedData), encoding:.utf8)!
}
}
class AESEncryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let data = string.data(using:.utf8)!
let keyData = key.data(using:.utf8)!
let iv = Data(repeating: 0, count: 16)
let encryptedData = try! AES(key: keyData, blockMode: CBC(iv: iv), padding:.pkcs7).encrypt(data)
return Data(encryptedData)
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
let iv = Data(repeating: 0, count: 16)
let decryptedData = try! AES(key: keyData, blockMode: CBC(iv: iv), padding:.pkcs7).decrypt(data)
return String(data: Data(decryptedData), encoding:.utf8)!
}
}```swift
protocol EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data
func decrypt(_ data: Data, _ key: String) -> String
}
// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let data = string.data(using:.utf8)!
let keyData = key.data(using:.utf8)!
let encryptedData = data.map { $0 ^ keyData.first! }
return Data(encryptedData)
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
let decryptedData = data.map { $0 ^ keyData.first! }
return String(data: Data(decryptedData), encoding:.utf8)!
}
}
// Encryptor that uses AES-128-CBC encryption and decryption.
class AESEncryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let data = string.data(using:.utf8)!
let keyData = key.data(using:.utf8)!
let iv = Data(repeating: 0, count: 16)
let encryptedData = try! AES(key: keyData, blockMode: CBC(iv: iv), padding:.pkcs7).encrypt(data)
return Data(encryptedData)
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
let iv = Data(repeating: 0, count: 16)
let decryptedData = try! AES(key: keyData, blockMode: CBC(iv: iv), padding:.pkcs7).decrypt(data)
return String(data: Data(decryptedData), encoding:.utf8)!
}
}
```let encryptedData = try! AES(key: keyData, blockMode: CBC(iv: iv), padding:.pkcs7).encrypt(data) // cannot infer contextual base in reference to member 'pkcs7'let encryptedData = try! AES(key: keyData, blockMode: CBC(iv: iv), padding:.pkcs7).encrypt(data) // cannot find 'AES' in scopelet encryptedData = try! AES(key: keyData, blockMode: CBC(iv: iv), padding:.pkcs7).encrypt(data) // cannot find 'CBC' in scopelet decryptedData = try! AES(key: keyData, blockMode: CBC(iv: iv), padding:.pkcs7).decrypt(data) // cannot find 'AES' in scopelet decryptedData = try! AES(key: keyData, blockMode: CBC(iv: iv), padding:.pkcs7).decrypt(data) // cannot infer contextual base in reference to member 'pkcs7'let decryptedData = try! AES(key: keyData, blockMode: CBC(iv: iv), padding:.pkcs7).decrypt(data) // cannot find 'CBC' in scopeprotocol EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data
func decrypt(_ data: Data, _ key: String) -> String
}
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let data = string.data(using:.utf8)!
let keyData = key.data(using:.utf8)!
let result = data.map { (byte: UInt8) -> UInt8 in
let keyByte = keyData.first!
return byte ^ keyByte
}
return Data(result)
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
let result = data.map { (byte: UInt8) -> UInt8 in
let keyByte = keyData.first!
return byte ^ keyByte
}
return String(data: Data(result), encoding:.utf8)!
}
}
class AESEncryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let data = string.data(using:.utf8)!
let keyData = key.data(using:.utf8)!
let iv = Data(repeating: 0, count: 16)
let encrypted = try! AES(key: keyData, blockMode: CBC(iv: iv), padding:.pkcs7).encrypt(data)
return encrypted
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
let iv = Data(repeating: 0, count: 16)
let decrypted = try! AES(key: keyData, blockMode: CBC(iv: iv), padding:.pkcs7).decrypt(data)
return String(data: decrypted, encoding:.utf8)!
}
}```swift
protocol EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data
func decrypt(_ data: Data, _ key: String) -> String
}
// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let data = string.data(using:.utf8)!
let keyData = key.data(using:.utf8)!
let result = data.map { (byte: UInt8) -> UInt8 in
let keyByte = keyData.first!
return byte ^ keyByte
}
return Data(result)
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
let result = data.map { (byte: UInt8) -> UInt8 in
let keyByte = keyData.first!
return byte ^ keyByte
}
return String(data: Data(result), encoding:.utf8)!
}
}
// Encryptor that uses AES-256-CBC encryption.
class AESEncryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let data = string.data(using:.utf8)!
let keyData = key.data(using:.utf8)!
let iv = Data(repeating: 0, count: 16)
let encrypted = try! AES(key: keyData, blockMode: CBC(iv: iv), padding:.pkcs7).encrypt(data)
return encrypted
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
let iv = Data(repeating: 0, count: 16)
let decrypted = try! AES(key: keyData, blockMode: CBC(iv: iv), padding:.pkcs7).decrypt(data)
return String(data: decrypted, encoding:.utf8)!
}
}
```let encrypted = try! AES(key: keyData, blockMode: CBC(iv: iv), padding:.pkcs7).encrypt(data) // cannot find 'CBC' in scopelet encrypted = try! AES(key: keyData, blockMode: CBC(iv: iv), padding:.pkcs7).encrypt(data) // cannot find 'AES' in scopelet encrypted = try! AES(key: keyData, blockMode: CBC(iv: iv), padding:.pkcs7).encrypt(data) // cannot infer contextual base in reference to member 'pkcs7'let decrypted = try! AES(key: keyData, blockMode: CBC(iv: iv), padding:.pkcs7).decrypt(data) // cannot find 'CBC' in scopelet decrypted = try! AES(key: keyData, blockMode: CBC(iv: iv), padding:.pkcs7).decrypt(data) // cannot infer contextual base in reference to member 'pkcs7'let decrypted = try! AES(key: keyData, blockMode: CBC(iv: iv), padding:.pkcs7).decrypt(data) // cannot find 'AES' in scopeprotocol EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data
func decrypt(_ data: Data, _ key: String) -> String
}
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let data = string.data(using:.utf8)!
let keyData = key.data(using:.utf8)!
let result = data.enumerated().map { (index, element) -> UInt8 in
let keyElement = keyData[index % keyData.count]
return element ^ keyElement
}
return Data(result)
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
let result = data.enumerated().map { (index, element) -> UInt8 in
let keyElement = keyData[index % keyData.count]
return element ^ keyElement
}
return String(data: Data(result), encoding:.utf8)!
}
}```swift
protocol EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data
func decrypt(_ data: Data, _ key: String) -> String
}
// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let data = string.data(using:.utf8)!
let keyData = key.data(using:.utf8)!
let result = data.enumerated().map { (index, element) -> UInt8 in
let keyElement = keyData[index % keyData.count]
return element ^ keyElement
}
return Data(result)
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
let result = data.enumerated().map { (index, element) -> UInt8 in
let keyElement = keyData[index % keyData.count]
return element ^ keyElement
}
return String(data: Data(result), encoding:.utf8)!
}
}
```protocol EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data
func decrypt(_ data: Data, _ key: String) -> String
}
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let plainText = string.data(using:.utf8)!
let keyData = key.data(using:.utf8)!
let encryptedData = plainText.xor(keyData)
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
let decryptedData = data.xor(keyData)
return String(data: decryptedData, encoding:.utf8)!
}
}
class AESEncryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let plainText = string.data(using:.utf8)!
let keyData = key.data(using:.utf8)!
let encryptedData = try! plainText.aes256Encrypt(keyData)
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
let decryptedData = try! data.aes256Decrypt(keyData)
return String(data: decryptedData, encoding:.utf8)!
}
}```swift
protocol EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data
func decrypt(_ data: Data, _ key: String) -> String
}
// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let plainText = string.data(using:.utf8)!
let keyData = key.data(using:.utf8)!
let encryptedData = plainText.xor(keyData)
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
let decryptedData = data.xor(keyData)
return String(data: decryptedData, encoding:.utf8)!
}
}
// Encryptor and decryptor that uses the AES-256 algorithm to encrypt and decrypt data.
class AESEncryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let plainText = string.data(using:.utf8)!
let keyData = key.data(using:.utf8)!
let encryptedData = try! plainText.aes256Encrypt(keyData)
return encryptedData
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
let decryptedData = try! data.aes256Decrypt(keyData)
return String(data: decryptedData, encoding:.utf8)!
}
}
```let encryptedData = plainText.xor(keyData) // value of type 'Data' has no member 'xor'let decryptedData = data.xor(keyData) // value of type 'Data' has no member 'xor'let encryptedData = try! plainText.aes256Encrypt(keyData) // value of type 'Data' has no member 'aes256Encrypt'let decryptedData = try! data.aes256Decrypt(keyData) // value of type 'Data' has no member 'aes256Decrypt'protocol EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data
func decrypt(_ data: Data, _ key: String) -> String
}
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let data = string.data(using:.utf8)!
let keyData = key.data(using:.utf8)!
let result = data.enumerated().map { (index, element) -> UInt8 in
let keyElement = keyData[index % keyData.count]
return element ^ keyElement
}
return Data(result)
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
let result = data.enumerated().map { (index, element) -> UInt8 in
let keyElement = keyData[index % keyData.count]
return element ^ keyElement
}
return String(data: Data(result), encoding:.utf8)!
}
}```swift
protocol EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data
func decrypt(_ data: Data, _ key: String) -> String
}
// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let data = string.data(using:.utf8)!
let keyData = key.data(using:.utf8)!
let result = data.enumerated().map { (index, element) -> UInt8 in
let keyElement = keyData[index % keyData.count]
return element ^ keyElement
}
return Data(result)
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
let result = data.enumerated().map { (index, element) -> UInt8 in
let keyElement = keyData[index % keyData.count]
return element ^ keyElement
}
return String(data: Data(result), encoding:.utf8)!
}
}
// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let data = string.data(using:.utf8)!
let keyData = key.data(using:.utf8)!
let result = data.enumerated().map { (index, element) -> UInt8 in
let keyElement = keyData[index % keyData.count]
return element ^ keyElement
}
return Data(result)
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
let result = data.enumerated().map { (index, element) -> UInt8 in
let keyElement = keyData[index % keyData.count]
return element ^ keyElement
}
return String(data: Data(result), encoding:.utf8)!
}
}
// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let data = string.data(using:.utf8)!
let keyData = key.data(using:.utf8)!
let result = data.enumerated().map { (index, element) -> UInt8 in
let keyElement = keyData[index % keyData.count]
return element ^ keyElement
}
return Data(result)
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
let result = data.enumerated().map { (index, element) -> UInt8 in
let keyElement = keyData[index % keyData.count]
return element ^ keyElement
}
return String(data: Data(result), encoding:.utf8)!
}
}
// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let data = string.data(using:.utf8)!
let keyData = key.data(using:.utf8)!
let result = data.enumerated().map { (index, element) -> UInt8 in
let keyElement = keyData[index % keyData.count]
return element ^ keyElement
}
return Data(result)
}
func decrypt(_ data: Data, _ key: String) -> String {
let keyData = key.data(using:.utf8)!
let result = data.enumerated().map { (index, element) -> UInt8 in
let keyElement = keyData[index % keyData.count]
return element ^ keyElement
}
return String(data: Data(result), encoding:.utf8)!
}
}
// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor: EncryptorProtocol {
func encrypt(_ string: String, _ key: String) -> Data {
let data = string.data(using:.utf8)!
let keyData = key.data(using:.utf8)!
let result = data.enumerated().map { (index, element) -> UInt8 in
let keyElement = keyData[index % keyData.count]
return element ^ keyElement
}
return Data(result)
}
func decrypt(_protocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
class RateLimiter: RateLimiterProtocol {
let maxRequests: Int
let timeInterval: TimeInterval
var requestsMade: Int = 0
var lastRequestTime: Date?
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
if requestsMade < maxRequests {
requestsMade += 1
lastRequestTime = Date()
return true
} else if let lastRequestTime = lastRequestTime, lastRequestTime.timeIntervalSinceNow < -timeInterval {
requestsMade = 1
lastRequestTime = Date()
return true
}
return false
}
}```swift
protocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
// Rate limiter that controls the rate of actions.
// Consists with a maximum number of requests and a time interval, and includes a method to determine if a new request can be made within the defined limits.
class RateLimiter: RateLimiterProtocol {
let maxRequests: Int
let timeInterval: TimeInterval
var requestsMade: Int = 0
var lastRequestTime: Date?
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
if requestsMade < maxRequests {
requestsMade += 1
lastRequestTime = Date()
return true
} else if let lastRequestTime = lastRequestTime, lastRequestTime.timeIntervalSinceNow < -timeInterval {
requestsMade = 1
lastRequestTime = Date()
return true
}
return false
}
}
```lastRequestTime = Date() // cannot assign to value: 'lastRequestTime' is a 'let' constantThread.sleep(forTimeInterval: 1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6protocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
class RateLimiter: RateLimiterProtocol {
private let maxRequests: Int
private let timeInterval: TimeInterval
private var requestsMade: Int = 0
private let timeIntervalQueue = DispatchQueue(label: "com.ratelimiter.timeIntervalQueue")
private let requestsMadeQueue = DispatchQueue(label: "com.ratelimiter.requestsMadeQueue")
init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
requestsMadeQueue.sync {
requestsMade += 1
if requestsMade > maxRequests {
requestsMade = maxRequests
}
}
timeIntervalQueue.asyncAfter(deadline:.now() + timeInterval) {
self.requestsMadeQueue.sync {
self.requestsMade -= 1
}
}
return requestsMade < maxRequests
}
}```swift
protocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
// Rate limiter that controls the rate of actions.
// Consists with a maximum number of requests and a time interval, and includes a method to determine if a new request can be made within the defined limits.
class RateLimiter: RateLimiterProtocol {
private let maxRequests: Int
private let timeInterval: TimeInterval
private var requestsMade: Int = 0
private let timeIntervalQueue = DispatchQueue(label: "com.ratelimiter.timeIntervalQueue")
private let requestsMadeQueue = DispatchQueue(label: "com.ratelimiter.requestsMadeQueue")
init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
requestsMadeQueue.sync {
requestsMade += 1
if requestsMade > maxRequests {
requestsMade = maxRequests
}
}
timeIntervalQueue.asyncAfter(deadline:.now() + timeInterval) {
self.requestsMadeQueue.sync {
self.requestsMade -= 1
}
}
return requestsMade < maxRequests
}
}
```init(maxRequests: Int, timeInterval: TimeInterval) { // initializer requirement 'init(maxRequests:timeInterval:)' can only be satisfied by a 'required' initializer in non-final class 'RateLimiter'Thread.sleep(forTimeInterval: 1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6protocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
class RateLimiter: RateLimiterProtocol {
private let maxRequests: Int
private let timeInterval: TimeInterval
private var requests: Int = 0
private var lastRequest: Date?
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
guard let lastRequest = lastRequest else {
return true
}
if Date().timeIntervalSince(lastRequest) > timeInterval {
requests = 0
}
requests += 1
lastRequest = Date()
return requests <= maxRequests
}
}```swift
protocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
// Rate limiter that controls the rate of actions.
// Consists with a maximum number of requests and a time interval, and includes a method to determine if a new request can be made within the defined limits.
class RateLimiter: RateLimiterProtocol {
private let maxRequests: Int
private let timeInterval: TimeInterval
private var requests: Int = 0
private var lastRequest: Date?
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
guard let lastRequest = lastRequest else {
return true
}
if Date().timeIntervalSince(lastRequest) > timeInterval {
requests = 0
}
requests += 1
lastRequest = Date()
return requests <= maxRequests
}
}
```lastRequest = Date() // cannot assign to value: 'lastRequest' is a 'let' constantThread.sleep(forTimeInterval: 1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6protocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
class RateLimiter: RateLimiterProtocol {
private let maxRequests: Int
private let timeInterval: TimeInterval
private var requests: Int
private let queue: DispatchQueue
private var timer: Timer?
init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
self.requests = 0
self.queue = DispatchQueue(label: "com.ratelimiter.queue")
}
func allowRequest() -> Bool {
queue.sync {
if requests < maxRequests {
requests += 1
return true
} else {
if timer == nil {
timer = Timer.scheduledTimer(withTimeInterval: timeInterval, repeats: false, block: { [weak self] _ in
self?.requests = 0
self?.timer = nil
})
}
return false
}
}
}
}```swift
protocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
// Rate limiter that controls the rate of actions.
// Consists with a maximum number of requests and a time interval, and includes a method to determine if a new request can be made within the defined limits.
class RateLimiter: RateLimiterProtocol {
private let maxRequests: Int
private let timeInterval: TimeInterval
private var requests: Int
private let queue: DispatchQueue
private var timer: Timer?
init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
self.requests = 0
self.queue = DispatchQueue(label: "com.ratelimiter.queue")
}
func allowRequest() -> Bool {
queue.sync {
if requests < maxRequests {
requests += 1
return true
} else {
if timer == nil {
timer = Timer.scheduledTimer(withTimeInterval: timeInterval, repeats: false, block: { [weak self] _ in
self?.requests = 0
self?.timer = nil
})
}
return false
}
}
}
}
```init(maxRequests: Int, timeInterval: TimeInterval) { // initializer requirement 'init(maxRequests:timeInterval:)' can only be satisfied by a 'required' initializer in non-final class 'RateLimiter'Thread.sleep(forTimeInterval: 1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6protocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
class RateLimiter: RateLimiterProtocol {
let maxRequests: Int
let timeInterval: TimeInterval
var requests: Int = 0
var lastRequestTime: Date?
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
if requests >= maxRequests {
return false
}
if let lastRequestTime = lastRequestTime {
if Date().timeIntervalSince(lastRequestTime) < timeInterval {
return false
}
}
requests += 1
lastRequestTime = Date()
return true
}
}```swift
protocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
// Rate limiter that controls the rate of actions.
// Consists with a maximum number of requests and a time interval, and includes a method to determine if a new request can be made within the defined limits.
class RateLimiter: RateLimiterProtocol {
let maxRequests: Int
let timeInterval: TimeInterval
var requests: Int = 0
var lastRequestTime: Date?
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
if requests >= maxRequests {
return false
}
if let lastRequestTime = lastRequestTime {
if Date().timeIntervalSince(lastRequestTime) < timeInterval {
return false
}
}
requests += 1
lastRequestTime = Date()
return true
}
}
```Thread.sleep(forTimeInterval: 1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6 // XCTAssertTrue failedprotocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
class RateLimiter: RateLimiterProtocol {
let maxRequests: Int
let timeInterval: TimeInterval
var requestsMade: Int = 0
var lastRequestTime: Date?
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
if requestsMade < maxRequests {
requestsMade += 1
lastRequestTime = Date()
return true
} else if let lastRequestTime = lastRequestTime, lastRequestTime.addingTimeInterval(timeInterval) < Date() {
requestsMade = 1
lastRequestTime = Date()
return true
}
return false
}
}```swift
protocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
// Rate limiter that controls the rate of actions.
// Consists with a maximum number of requests and a time interval, and includes a method to determine if a new request can be made within the defined limits.
class RateLimiter: RateLimiterProtocol {
let maxRequests: Int
let timeInterval: TimeInterval
var requestsMade: Int = 0
var lastRequestTime: Date?
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
if requestsMade < maxRequests {
requestsMade += 1
lastRequestTime = Date()
return true
} else if let lastRequestTime = lastRequestTime, lastRequestTime.addingTimeInterval(timeInterval) < Date() {
requestsMade = 1
lastRequestTime = Date()
return true
}
return false
}
}
```lastRequestTime = Date() // cannot assign to value: 'lastRequestTime' is a 'let' constantThread.sleep(forTimeInterval: 1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6protocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
class RateLimiter: RateLimiterProtocol {
private let maxRequests: Int
private let timeInterval: TimeInterval
private var requestsMade: Int
private let queue: DispatchQueue
private var lastRequestTime: Date?
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
self.requestsMade = 0
self.queue = DispatchQueue(label: "com.rate-limiter.queue")
self.lastRequestTime = nil
}
func allowRequest() -> Bool {
queue.sync {
guard let lastRequestTime = self.lastRequestTime else {
self.lastRequestTime = Date()
return true
}
if Date().timeIntervalSince(lastRequestTime) > timeInterval {
self.requestsMade = 0
self.lastRequestTime = Date()
return true
}
if requestsMade < maxRequests {
self.requestsMade += 1
return true
}
return false
}
}
}```swift
protocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
// Rate limiter that controls the rate of actions.
// Consists with a maximum number of requests and a time interval, and includes a method to determine if a new request can be made within the defined limits.
class RateLimiter: RateLimiterProtocol {
private let maxRequests: Int
private let timeInterval: TimeInterval
private var requestsMade: Int
private let queue: DispatchQueue
private var lastRequestTime: Date?
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
self.requestsMade = 0
self.queue = DispatchQueue(label: "com.rate-limiter.queue")
self.lastRequestTime = nil
}
func allowRequest() -> Bool {
queue.sync {
guard let lastRequestTime = self.lastRequestTime else {
self.lastRequestTime = Date()
return true
}
if Date().timeIntervalSince(lastRequestTime) > timeInterval {
self.requestsMade = 0
self.lastRequestTime = Date()
return true
}
if requestsMade < maxRequests {
self.requestsMade += 1
return true
}
return false
}
}
}
```Thread.sleep(forTimeInterval: 1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6 // XCTAssertFalse failedprotocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
class RateLimiter: RateLimiterProtocol {
let maxRequests: Int
let timeInterval: TimeInterval
var requests: Int = 0
var lastRequestTime: Date?
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
if requests >= maxRequests {
return false
}
if let lastRequestTime = lastRequestTime {
let timeSinceLastRequest = Date().timeIntervalSince(lastRequestTime)
if timeSinceLastRequest < timeInterval {
return false
}
}
requests += 1
lastRequestTime = Date()
return true
}
}```swift
protocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
// Rate limiter that controls the rate of actions.
// Consists with a maximum number of requests and a time interval, and includes a method to determine if a new request can be made within the defined limits.
class RateLimiter: RateLimiterProtocol {
let maxRequests: Int
let timeInterval: TimeInterval
var requests: Int = 0
var lastRequestTime: Date?
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
if requests >= maxRequests {
return false
}
if let lastRequestTime = lastRequestTime {
let timeSinceLastRequest = Date().timeIntervalSince(lastRequestTime)
if timeSinceLastRequest < timeInterval {
return false
}
}
requests += 1
lastRequestTime = Date()
return true
}
}
```Thread.sleep(forTimeInterval: 1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6 // XCTAssertTrue failedprotocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
class RateLimiter: RateLimiterProtocol {
private let maxRequests: Int
private let timeInterval: TimeInterval
private var requests: Int = 0
private var lastRequestTime: Date?
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
if requests >= maxRequests {
return false
}
if let lastRequestTime = lastRequestTime {
let timeSinceLastRequest = Date().timeIntervalSince(lastRequestTime)
if timeSinceLastRequest < timeInterval {
return false
}
}
requests += 1
lastRequestTime = Date()
return true
}
}```swift
protocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
// Rate limiter that controls the rate of actions.
// Consists with a maximum number of requests and a time interval, and includes a method to determine if a new request can be made within the defined limits.
class RateLimiter: RateLimiterProtocol {
private let maxRequests: Int
private let timeInterval: TimeInterval
private var requests: Int = 0
private var lastRequestTime: Date?
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
if requests >= maxRequests {
return false
}
if let lastRequestTime = lastRequestTime {
let timeSinceLastRequest = Date().timeIntervalSince(lastRequestTime)
if timeSinceLastRequest < timeInterval {
return false
}
}
requests += 1
lastRequestTime = Date()
return true
}
}
```Thread.sleep(forTimeInterval: 1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6 // XCTAssertTrue failedprotocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
class RateLimiter: RateLimiterProtocol {
private let maxRequests: Int
private let timeInterval: TimeInterval
private var requests: Int = 0
private var lastRequestTime: Date?
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
guard requests < maxRequests else { return false }
requests += 1
lastRequestTime = Date()
return true
}
func reset() {
requests = 0
lastRequestTime = nil
}
}```swift
protocol RateLimiterProtocol {
init(maxRequests: Int, timeInterval: TimeInterval)
func allowRequest() -> Bool
}
// Rate limiter that controls the rate of actions.
// Consists with a maximum number of requests and a time interval, and includes a method to determine if a new request can be made within the defined limits.
class RateLimiter: RateLimiterProtocol {
private let maxRequests: Int
private let timeInterval: TimeInterval
private var requests: Int = 0
private var lastRequestTime: Date?
required init(maxRequests: Int, timeInterval: TimeInterval) {
self.maxRequests = maxRequests
self.timeInterval = timeInterval
}
func allowRequest() -> Bool {
guard requests < maxRequests else { return false }
requests += 1
lastRequestTime = Date()
return true
}
func reset() {
requests = 0
lastRequestTime = nil
}
}
```Thread.sleep(forTimeInterval: 1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6 // XCTAssertTrue failedprotocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private let lock = NSLock()
private var value: Int
required init(value: Int) {
self.value = value
}
func increment() {
lock.lock()
defer { lock.unlock() }
value += 1
}
func currentValue() -> Int {
lock.lock()
defer { lock.unlock() }
return value
}
}```swift
protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private let lock = NSLock()
private var value: Int
required init(value: Int) {
self.value = value
}
func increment() {
lock.lock()
defer { lock.unlock() }
value += 1
}
func currentValue() -> Int {
lock.lock()
defer { lock.unlock() }
return value
}
}
```protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private let lock = NSLock()
private var value: Int
required init(value: Int) {
self.value = value
}
func increment() {
lock.lock()
value += 1
lock.unlock()
}
func currentValue() -> Int {
lock.lock()
let currentValue = value
lock.unlock()
return currentValue
}
}```swift
protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private let lock = NSLock()
private var value: Int
required init(value: Int) {
self.value = value
}
func increment() {
lock.lock()
value += 1
lock.unlock()
}
func currentValue() -> Int {
lock.lock()
let currentValue = value
lock.unlock()
return currentValue
}
}
```protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var value: Int
private let queue: DispatchQueue
required init(value: Int) {
self.value = value
self.queue = DispatchQueue(label: "com.example.threadsafecounter")
}
func increment() {
queue.sync {
value += 1
}
}
func currentValue() -> Int {
return queue.sync {
return value
}
}
}```swift
protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var value: Int
private let queue: DispatchQueue
required init(value: Int) {
self.value = value
self.queue = DispatchQueue(label: "com.example.threadsafecounter")
}
func increment() {
queue.sync {
value += 1
}
}
func currentValue() -> Int {
return queue.sync {
return value
}
}
}
```protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var counter: Int
private let lock = NSLock()
required init(value: Int) {
counter = value
}
func increment() {
lock.lock()
counter += 1
lock.unlock()
}
func currentValue() -> Int {
lock.lock()
let value = counter
lock.unlock()
return value
}
}```swift
protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var counter: Int
private let lock = NSLock()
required init(value: Int) {
counter = value
}
func increment() {
lock.lock()
counter += 1
lock.unlock()
}
func currentValue() -> Int {
lock.lock()
let value = counter
lock.unlock()
return value
}
}
```protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private let lock = NSLock()
private var value: Int
required init(value: Int) {
self.value = value
}
func increment() {
lock.lock()
defer { lock.unlock() }
value += 1
}
func currentValue() -> Int {
lock.lock()
defer { lock.unlock() }
return value
}
}```swift
protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private let lock = NSLock()
private var value: Int
required init(value: Int) {
self.value = value
}
func increment() {
lock.lock()
defer { lock.unlock() }
value += 1
}
func currentValue() -> Int {
lock.lock()
defer { lock.unlock() }
return value
}
}
```protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private let lock = NSLock()
private var value: Int
required init(value: Int) {
self.value = value
}
func increment() {
lock.lock()
defer { lock.unlock() }
value += 1
}
func currentValue() -> Int {
lock.lock()
defer { lock.unlock() }
return value
}
}```swift
protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private let lock = NSLock()
private var value: Int
required init(value: Int) {
self.value = value
}
func increment() {
lock.lock()
defer { lock.unlock() }
value += 1
}
func currentValue() -> Int {
lock.lock()
defer { lock.unlock() }
return value
}
}
```protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private let lock = NSLock()
private var value: Int
required init(value: Int) {
self.value = value
}
func increment() {
lock.lock()
value += 1
lock.unlock()
}
func currentValue() -> Int {
lock.lock()
let currentValue = value
lock.unlock()
return currentValue
}
}```swift
protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private let lock = NSLock()
private var value: Int
required init(value: Int) {
self.value = value
}
func increment() {
lock.lock()
value += 1
lock.unlock()
}
func currentValue() -> Int {
lock.lock()
let currentValue = value
lock.unlock()
return currentValue
}
}
```protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private let lock = NSLock()
private var value: Int
required init(value: Int) {
self.value = value
}
func increment() {
lock.lock()
defer { lock.unlock() }
value += 1
}
func currentValue() -> Int {
lock.lock()
defer { lock.unlock() }
return value
}
}```swift
protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private let lock = NSLock()
private var value: Int
required init(value: Int) {
self.value = value
}
func increment() {
lock.lock()
defer { lock.unlock() }
value += 1
}
func currentValue() -> Int {
lock.lock()
defer { lock.unlock() }
return value
}
}
```protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private let lock = NSLock()
private var value: Int
required init(value: Int) {
self.value = value
}
func increment() {
lock.lock()
defer { lock.unlock() }
value += 1
}
func currentValue() -> Int {
lock.lock()
defer { lock.unlock() }
return value
}
}```swift
protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private let lock = NSLock()
private var value: Int
required init(value: Int) {
self.value = value
}
func increment() {
lock.lock()
defer { lock.unlock() }
value += 1
}
func currentValue() -> Int {
lock.lock()
defer { lock.unlock() }
return value
}
}
```protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var value: Int
private let queue = DispatchQueue(label: "com.example.threadsafecounter", attributes:.concurrent)
required init(value: Int) {
self.value = value
}
func increment() {
queue.async(flags:.barrier) {
self.value += 1
}
}
func currentValue() -> Int {
queue.sync {
return self.value
}
}
}```swift
protocol ThreadSafeCounterProtocol {
init(value: Int)
func increment()
func currentValue() -> Int
}
// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter: ThreadSafeCounterProtocol {
private var value: Int
private let queue = DispatchQueue(label: "com.example.threadsafecounter", attributes:.concurrent)
required init(value: Int) {
self.value = value
}
func increment() {
queue.async(flags:.barrier) {
self.value += 1
}
}
func currentValue() -> Int {
queue.sync {
return self.value
}
}
}
```protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
class Pipeline<Output>: PipelineProtocol {
typealias Output = Output
private let value: Output
required init(value: Output) {
self.value = value
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
return Pipeline<U>(value: transform(value))
}
func execute() -> Output {
return value
}
}```swift
protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
// Functional pipeline builder class conforming to a protocol, allowing chaining transformations with type changes.
// Ensure the final output is produced by sequentially applying transformations starting from an initial value.
class Pipeline<Output>: PipelineProtocol {
typealias Output = Output
private let value: Output
required init(value: Output) {
self.value = value
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
return Pipeline<U>(value: transform(value))
}
func execute() -> Output {
return value
}
}
// Example usage
let pipeline = Pipeline<Int>(value: 1)
.pipe { $0 + 1 }
.pipe { $0 + 1 }
.pipe { $0 + 1 }
.execute()
print(pipeline) // 4
```protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
class Pipeline<Output>: PipelineProtocol {
typealias Output = Output
private var value: Output
required init(value: Output) {
self.value = value
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
return Pipeline<U>(value: transform(value))
}
func execute() -> Output {
return value
}
}```swift
protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
// Functional pipeline builder class conforming to a protocol, allowing chaining transformations with type changes.
// Ensure the final output is produced by sequentially applying transformations starting from an initial value.
class Pipeline<Output>: PipelineProtocol {
typealias Output = Output
private var value: Output
required init(value: Output) {
self.value = value
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
return Pipeline<U>(value: transform(value))
}
func execute() -> Output {
return value
}
}
// Example usage
let pipeline = Pipeline<Int>(value: 1)
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 - 1 }
.execute()
print(pipeline) // 4
```protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
class Pipeline<Output>: PipelineProtocol {
let value: Output
required init(value: Output) {
self.value = value
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
return Pipeline<U>(value: transform(value))
}
func execute() -> Output {
return value
}
}```swift
protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
// Functional pipeline builder class conforming to a protocol, allowing chaining transformations with type changes.
// Ensure the final output is produced by sequentially applying transformations starting from an initial value.
class Pipeline<Output>: PipelineProtocol {
let value: Output
required init(value: Output) {
self.value = value
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
return Pipeline<U>(value: transform(value))
}
func execute() -> Output {
return value
}
}
// Example usage:
let pipeline = Pipeline<Int>(value: 1)
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
class Pipeline<Output>: PipelineProtocol {
typealias Output = Output
var value: Output
required init(value: Output) {
self.value = value
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
return Pipeline<U>(value: transform(value))
}
func execute() -> Output {
return value
}
}```swift
protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
// Functional pipeline builder class conforming to a protocol, allowing chaining transformations with type changes.
// Ensure the final output is produced by sequentially applying transformations starting from an initial value.
class Pipeline<Output>: PipelineProtocol {
typealias Output = Output
var value: Output
required init(value: Output) {
self.value = value
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
return Pipeline<U>(value: transform(value))
}
func execute() -> Output {
return value
}
}
// Example usage
let pipeline = Pipeline<Int>(value: 1)
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 - 1 }
.execute()
print(pipeline) // 2
```protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
class Pipeline<Output>: PipelineProtocol {
typealias Output = Output
private let value: Output
required init(value: Output) {
self.value = value
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
return Pipeline<U>(value: transform(value))
}
func execute() -> Output {
return value
}
}```swift
protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
// Functional pipeline builder class conforming to a protocol, allowing chaining transformations with type changes.
// Ensure the final output is produced by sequentially applying transformations starting from an initial value.
class Pipeline<Output>: PipelineProtocol {
typealias Output = Output
private let value: Output
required init(value: Output) {
self.value = value
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
return Pipeline<U>(value: transform(value))
}
func execute() -> Output {
return value
}
}
```protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
class Pipeline<Output>: PipelineProtocol {
typealias Output = Output
private var value: Output
required init(value: Output) {
self.value = value
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
return Pipeline<U>(value: transform(value))
}
func execute() -> Output {
return value
}
}```swift
protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
// Functional pipeline builder class conforming to a protocol, allowing chaining transformations with type changes.
// Ensure the final output is produced by sequentially applying transformations starting from an initial value.
class Pipeline<Output>: PipelineProtocol {
typealias Output = Output
private var value: Output
required init(value: Output) {
self.value = value
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
return Pipeline<U>(value: transform(value))
}
func execute() -> Output {
return value
}
}
// Example usage:
let pipeline = Pipeline<Int>(value: 1)
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 / 2 }
.execute()
print(pipeline) // 1
```protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
class Pipeline<Output>: PipelineProtocol {
private var value: Output
required init(value: Output) {
self.value = value
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
return Pipeline<U>(value: transform(value))
}
func execute() -> Output {
return value
}
}```swift
protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
// Functional pipeline builder class conforming to a protocol, allowing chaining transformations with type changes.
// Ensure the final output is produced by sequentially applying transformations starting from an initial value.
class Pipeline<Output>: PipelineProtocol {
private var value: Output
required init(value: Output) {
self.value = value
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
return Pipeline<U>(value: transform(value))
}
func execute() -> Output {
return value
}
}
// Example usage:
let pipeline = Pipeline<Int>(value: 1)
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 3 }
.execute()
print(pipeline) // 8
```protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
class Pipeline<Output>: PipelineProtocol {
private var value: Output
required init(value: Output) {
self.value = value
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
return Pipeline<U>(value: transform(value))
}
func execute() -> Output {
return value
}
}```swift
protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
// Functional pipeline builder class conforming to a protocol, allowing chaining transformations with type changes.
// Ensure the final output is produced by sequentially applying transformations starting from an initial value.
class Pipeline<Output>: PipelineProtocol {
private var value: Output
required init(value: Output) {
self.value = value
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
return Pipeline<U>(value: transform(value))
}
func execute() -> Output {
return value
}
}
// Example usage
let pipeline = Pipeline<Int>(value: 1)
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 - 1 }
.execute()
print(pipeline) // 4
```protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
class Pipeline<Output>: PipelineProtocol {
private var value: Output
required init(value: Output) {
self.value = value
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
return Pipeline<U>(value: transform(value))
}
func execute() -> Output {
return value
}
}```swift
protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
// Functional pipeline builder class conforming to a protocol, allowing chaining transformations with type changes.
// Ensure the final output is produced by sequentially applying transformations starting from an initial value.
class Pipeline<Output>: PipelineProtocol {
private var value: Output
required init(value: Output) {
self.value = value
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
return Pipeline<U>(value: transform(value))
}
func execute() -> Output {
return value
}
}
// Example usage
let pipeline = Pipeline<Int>(value: 10)
.pipe { $0 + 1 }
.pipe { $0 * 2 }
.pipe { $0 + 1 }
.execute()
print(pipeline) // 23
```protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
class Pipeline<Output>: PipelineProtocol {
typealias Output = Output
var value: Output
required init(value: Output) {
self.value = value
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
return Pipeline<U>(value: transform(value))
}
func execute() -> Output {
return value
}
}```swift
protocol PipelineProtocol {
associatedtype Output
init(value: Output)
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
func execute() -> Output
}
// Functional pipeline builder class conforming to a protocol, allowing chaining transformations with type changes.
// Ensure the final output is produced by sequentially applying transformations starting from an initial value.
class Pipeline<Output>: PipelineProtocol {
typealias Output = Output
var value: Output
required init(value: Output) {
self.value = value
}
func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
return Pipeline<U>(value: transform(value))
}
func execute() -> Output {
return value
}
}
// Example usage
let pipeline = Pipeline<String>(value: "Hello")
.pipe { $0 + " World" }
.pipe { $0.uppercased() }
.execute()
print(pipeline) // "HELLO WORLD"
```protocol ObservablePropertyProtocol {
associatedtype Value
init(value: Value)
var value: Value { get set }
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
func unsubscribe(_ observer: UUID)
}
class ObservableProperty<Value> : ObservablePropertyProtocol {
typealias Value = Value
private var observers: [UUID: (Value) -> Void] = [:]
private var value: Value
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let uuid = UUID()
observers[uuid] = observer
return uuid
}
func unsubscribe(_ observer: UUID) {
observers.removeValue(forKey: observer)
}
var value: Value {
get {
return self.value
}
set {
if self.value!= newValue {
self.value = newValue
observers.values.forEach { $0(newValue) }
}
}
}
}```swift
protocol ObservablePropertyProtocol {
associatedtype Value
init(value: Value)
var value: Value { get set }
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
func unsubscribe(_ observer: UUID)
}
// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
typealias Value = Value
private var observers: [UUID: (Value) -> Void] = [:]
private var value: Value
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let uuid = UUID()
observers[uuid] = observer
return uuid
}
func unsubscribe(_ observer: UUID) {
observers.removeValue(forKey: observer)
}
var value: Value {
get {
return self.value
}
set {
if self.value!= newValue {
self.value = newValue
observers.values.forEach { $0(newValue) }
}
}
}
}
// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
typealias Value = Value
private var observers: [UUID: (Value) -> Void] = [:]
private var value: Value
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let uuid = UUID()
observers[uuid] = observer
return uuid
}
func unsubscribe(_ observer: UUID) {
observers.removeValue(forKey: observer)
}
var value: Value {
get {
return self.value
}
set {
if self.value!= newValue {
self.value = newValue
observers.values.forEach { $0(newValue) }
}
}
}
}
```private var value: Value // property 'value' must be declared internal because it matches a requirement in internal protocol 'ObservablePropertyProtocol'init(value: Value) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ObservableProperty<Value>'var value: Value { // invalid redeclaration of 'value'if self.value!= newValue { // cannot force unwrap value of non-optional type 'Value'if self.value!= newValue { // '=' must have consistent whitespace on both sidesif self.value!= newValue { // use of '=' in a boolean context, did you mean '=='?protocol ObservablePropertyProtocol {
associatedtype Value
init(value: Value)
var value: Value { get set }
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
func unsubscribe(_ observer: UUID)
}
class ObservableProperty<Value> : ObservablePropertyProtocol {
typealias Value = Value
var value: Value {
didSet {
notifyObservers()
}
}
private var observers: [UUID: (Value) -> Void] = [:]
private var observerId: UUID = UUID()
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
observerId = UUID()
observers[observerId] = observer
return observerId
}
func unsubscribe(_ observer: UUID) {
observers[observerId] = nil
}
private func notifyObservers() {
observers.forEach { observer in
observer.value(value)
}
}
}```swift
protocol ObservablePropertyProtocol {
associatedtype Value
init(value: Value)
var value: Value { get set }
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
func unsubscribe(_ observer: UUID)
}
// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
typealias Value = Value
var value: Value {
didSet {
notifyObservers()
}
}
private var observers: [UUID: (Value) -> Void] = [:]
private var observerId: UUID = UUID()
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
observerId = UUID()
observers[observerId] = observer
return observerId
}
func unsubscribe(_ observer: UUID) {
observers[observerId] = nil
}
private func notifyObservers() {
observers.forEach { observer in
observer.value(value)
}
}
}
// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
typealias Value = Value
var value: Value {
didSet {
notifyObservers()
}
}
private var observers: [UUID: (Value) -> Void] = [:]
private var observerId: UUID = UUID()
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
observerId = UUID()
observers[observerId] = observer
return observerId
}
func unsubscribe(_ observer: UUID) {
observers[observerId] = nil
}
private func notifyObservers() {
observers.forEach { observer in
observer.value(value)
}
}
}
// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
typealias Value = Value
var value: Value {
didSet {
notifyObservers()
}
}
private var observers: [UUID: (Value) -> Void] = [:]
private var observerId: UUID = UUID()
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
observerId = UUID()
observers[observerId] = observer
return observerId
}
func unsubscribe(_ observer: UUID) {
observers[observerId] = nil
}
private func notifyObservers() {
observers.forEach { observer in
observer.value(value)
}
}
}
// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
typealias Value = Value
var value: Value {
didSet {
notifyObservers()
}
}
private var observers: [UUID: (Value) -> Void] = [:]
private var observerId: UUID = UUID()
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
observerId = UUID()
observers[observerId] = observer
return observerId
}
func unsubscribe(_ observer: UUID) {
observers[observerId] = nil
}
private func notifyObservers() {
observers.forEach { observer in
observer.value(value)
}
}
}
// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
typealias Value = Value
var value: Value {
didSet {
notifyObservers()
}
}
private var observers: [UUID: (Value) -> Void] = [:]
private var observerId: UUID = UUID()
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
observerId = UUID()
observers[observerId] = observer
return observerId
}
func unsubscribe(_ observer: UUID) {
observers[observerId] = nil
}
private func notifyObservers() {
observers.forEach { observer in
observer.value(value)
}
}
}
// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
typealias Value = Value
var value: Value {
didSet {
notifyObservers()
}
}
private var observers: [UUID: (Value) -> Void] = [:]
private var observerId: UUID = UUID()
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
observerId = UUID()init(value: Value) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ObservableProperty<Value>'protocol ObservablePropertyProtocol {
associatedtype Value
init(value: Value)
var value: Value { get set }
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
func unsubscribe(_ observer: UUID)
}
class ObservableProperty<Value> : ObservablePropertyProtocol {
typealias Value = Value
private var observers: [UUID: (Value) -> Void] = [:]
private var value: Value
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let uuid = UUID()
observers[uuid] = observer
return uuid
}
func unsubscribe(_ observer: UUID) {
observers[observer] = nil
}
var value: Value {
get { return self.value }
set {
let oldValue = self.value
self.value = newValue
for (_, observer) in observers {
observer(oldValue)
}
}
}
}
class ObservableProperty<Value: Equatable> : ObservablePropertyProtocol {
typealias Value = Value
private var observers: [UUID: (Value) -> Void] = [:]
private var value: Value
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let uuid = UUID()
observers[uuid] = observer
return uuid
}
func unsubscribe(_ observer: UUID) {
observers[observer] = nil
}
var value: Value {
get { return self.value }
set {
if self.value!= newValue {
let oldValue = self.value
self.value = newValue
for (_, observer) in observers {
observer(oldValue)
}
}
}
}
}```swift
protocol ObservablePropertyProtocol {
associatedtype Value
init(value: Value)
var value: Value { get set }
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
func unsubscribe(_ observer: UUID)
}
// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
typealias Value = Value
private var observers: [UUID: (Value) -> Void] = [:]
private var value: Value
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let uuid = UUID()
observers[uuid] = observer
return uuid
}
func unsubscribe(_ observer: UUID) {
observers[observer] = nil
}
var value: Value {
get { return self.value }
set {
let oldValue = self.value
self.value = newValue
for (_, observer) in observers {
observer(oldValue)
}
}
}
}
// Observable property that notifies observers of value changes.
class ObservableProperty<Value: Equatable> : ObservablePropertyProtocol {
typealias Value = Value
private var observers: [UUID: (Value) -> Void] = [:]
private var value: Value
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let uuid = UUID()
observers[uuid] = observer
return uuid
}
func unsubscribe(_ observer: UUID) {
observers[observer] = nil
}
var value: Value {
get { return self.value }
set {
if self.value!= newValue {
let oldValue = self.value
self.value = newValue
for (_, observer) in observers {
observer(oldValue)
}
}
}
}
}
```private var value: Value // property 'value' must be declared internal because it matches a requirement in internal protocol 'ObservablePropertyProtocol'init(value: Value) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ObservableProperty<Value>'var value: Value { // invalid redeclaration of 'value'class ObservableProperty<Value: Equatable> : ObservablePropertyProtocol { // invalid redeclaration of 'ObservableProperty'private var value: Value // property 'value' must be declared internal because it matches a requirement in internal protocol 'ObservablePropertyProtocol'init(value: Value) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ObservableProperty<Value>'var value: Value { // invalid redeclaration of 'value'if self.value!= newValue { // use of '=' in a boolean context, did you mean '=='?if self.value!= newValue { // cannot force unwrap value of non-optional type 'Value'if self.value!= newValue { // '=' must have consistent whitespace on both sidesprotocol ObservablePropertyProtocol {
associatedtype Value
init(value: Value)
var value: Value { get set }
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
func unsubscribe(_ observer: UUID)
}
class ObservableProperty<Value> : ObservablePropertyProtocol {
typealias Value = Value
private var observers: [UUID: (Value) -> Void] = [:]
private var value: Value
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let uuid = UUID()
observers[uuid] = observer
return uuid
}
func unsubscribe(_ observer: UUID) {
observers.removeValue(forKey: observer)
}
}```swift
protocol ObservablePropertyProtocol {
associatedtype Value
init(value: Value)
var value: Value { get set }
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
func unsubscribe(_ observer: UUID)
}
// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
typealias Value = Value
private var observers: [UUID: (Value) -> Void] = [:]
private var value: Value
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let uuid = UUID()
observers[uuid] = observer
return uuid
}
func unsubscribe(_ observer: UUID) {
observers.removeValue(forKey: observer)
}
}
```private var value: Value // property 'value' must be declared internal because it matches a requirement in internal protocol 'ObservablePropertyProtocol'init(value: Value) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ObservableProperty<Value>'protocol ObservablePropertyProtocol {
associatedtype Value
init(value: Value)
var value: Value { get set }
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
func unsubscribe(_ observer: UUID)
}
class ObservableProperty<Value> : ObservablePropertyProtocol {
typealias Value = Value
private var _value: Value
var value: Value {
get { return _value }
set {
if _value!= newValue {
_value = newValue
notifyObservers()
}
}
}
private var observers: [UUID: (Value) -> Void] = [:]
private var observerId: UUID = 0
init(value: Value) {
_value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
observerId += 1
observers[observerId] = observer
return observerId
}
func unsubscribe(_ observer: UUID) {
observers[observerId] = nil
}
private func notifyObservers() {
observers.forEach { $0.value(value) }
}
}```swift
protocol ObservablePropertyProtocol {
associatedtype Value
init(value: Value)
var value: Value { get set }
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
func unsubscribe(_ observer: UUID)
}
// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
typealias Value = Value
private var _value: Value
var value: Value {
get { return _value }
set {
if _value!= newValue {
_value = newValue
notifyObservers()
}
}
}
private var observers: [UUID: (Value) -> Void] = [:]
private var observerId: UUID = 0
init(value: Value) {
_value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
observerId += 1
observers[observerId] = observer
return observerId
}
func unsubscribe(_ observer: UUID) {
observers[observerId] = nil
}
private func notifyObservers() {
observers.forEach { $0.value(value) }
}
}
```if _value!= newValue { // cannot force unwrap value of non-optional type 'Value'if _value!= newValue { // use of '=' in a boolean context, did you mean '=='?if _value!= newValue { // '=' must have consistent whitespace on both sidesprivate var observerId: UUID = 0 // cannot convert value of type 'Int' to specified type 'UUID'init(value: Value) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ObservableProperty<Value>'observerId += 1 // binary operator '+=' cannot be applied to operands of type 'UUID' and 'Int'protocol ObservablePropertyProtocol {
associatedtype Value
init(value: Value)
var value: Value { get set }
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
func unsubscribe(_ observer: UUID)
}
class ObservableProperty<Value> : ObservablePropertyProtocol {
typealias Value = Value
private var observers = [UUID: (Value) -> Void]()
private var value: Value
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let uuid = UUID()
observers[uuid] = observer
return uuid
}
func unsubscribe(_ observer: UUID) {
observers.removeValue(forKey: observer)
}
var value: Value {
get { return self.value }
set {
if self.value!= newValue {
self.value = newValue
self.observers.values.forEach { $0(newValue) }
}
}
}
}```swift
protocol ObservablePropertyProtocol {
associatedtype Value
init(value: Value)
var value: Value { get set }
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
func unsubscribe(_ observer: UUID)
}
// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
typealias Value = Value
private var observers = [UUID: (Value) -> Void]()
private var value: Value
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let uuid = UUID()
observers[uuid] = observer
return uuid
}
func unsubscribe(_ observer: UUID) {
observers.removeValue(forKey: observer)
}
var value: Value {
get { return self.value }
set {
if self.value!= newValue {
self.value = newValue
self.observers.values.forEach { $0(newValue) }
}
}
}
}
// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
typealias Value = Value
private var observers = [UUID: (Value) -> Void]()
private var value: Value
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let uuid = UUID()
observers[uuid] = observer
return uuid
}
func unsubscribe(_ observer: UUID) {
observers.removeValue(forKey: observer)
}
var value: Value {
get { return self.value }
set {
if self.value!= newValue {
self.value = newValue
self.observers.values.forEach { $0(newValue) }
}
}
}
}
```private var value: Value // property 'value' must be declared internal because it matches a requirement in internal protocol 'ObservablePropertyProtocol'init(value: Value) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ObservableProperty<Value>'var value: Value { // invalid redeclaration of 'value'if self.value!= newValue { // cannot force unwrap value of non-optional type 'Value'if self.value!= newValue { // '=' must have consistent whitespace on both sidesif self.value!= newValue { // use of '=' in a boolean context, did you mean '=='?protocol ObservablePropertyProtocol {
associatedtype Value
init(value: Value)
var value: Value { get set }
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
func unsubscribe(_ observer: UUID)
}
class ObservableProperty<Value> : ObservablePropertyProtocol {
typealias Value = Value
var value: Value {
didSet {
observers.values.forEach { $0(value) }
}
}
private var observers: [UUID: (Value) -> Void] = [:]
private var observerCounter: UInt = 0
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let uuid = UUID()
observers[uuid] = observer
return uuid
}
func unsubscribe(_ observer: UUID) {
observers.removeValue(forKey: observer)
}
}```swift
protocol ObservablePropertyProtocol {
associatedtype Value
init(value: Value)
var value: Value { get set }
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
func unsubscribe(_ observer: UUID)
}
// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
typealias Value = Value
var value: Value {
didSet {
observers.values.forEach { $0(value) }
}
}
private var observers: [UUID: (Value) -> Void] = [:]
private var observerCounter: UInt = 0
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
let uuid = UUID()
observers[uuid] = observer
return uuid
}
func unsubscribe(_ observer: UUID) {
observers.removeValue(forKey: observer)
}
}
```init(value: Value) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ObservableProperty<Value>'protocol ObservablePropertyProtocol {
associatedtype Value
init(value: Value)
var value: Value { get set }
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
func unsubscribe(_ observer: UUID)
}
class ObservableProperty<Value> : ObservablePropertyProtocol {
typealias Value = Value
var value: Value {
didSet {
for observer in observers.values {
observer(value)
}
}
}
private var observers: [UUID: (Value) -> Void] = [:]
private var observerId: UUID = 0
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
observerId += 1
observers[observerId] = observer
return observerId
}
func unsubscribe(_ observer: UUID) {
observers[observerId] = nil
}
}```swift
protocol ObservablePropertyProtocol {
associatedtype Value
init(value: Value)
var value: Value { get set }
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
func unsubscribe(_ observer: UUID)
}
// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
typealias Value = Value
var value: Value {
didSet {
for observer in observers.values {
observer(value)
}
}
}
private var observers: [UUID: (Value) -> Void] = [:]
private var observerId: UUID = 0
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
observerId += 1
observers[observerId] = observer
return observerId
}
func unsubscribe(_ observer: UUID) {
observers[observerId] = nil
}
}
```private var observerId: UUID = 0 // cannot convert value of type 'Int' to specified type 'UUID'init(value: Value) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ObservableProperty<Value>'observerId += 1 // binary operator '+=' cannot be applied to operands of type 'UUID' and 'Int'protocol ObservablePropertyProtocol {
associatedtype Value
init(value: Value)
var value: Value { get set }
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
func unsubscribe(_ observer: UUID)
}
class ObservableProperty<Value> : ObservablePropertyProtocol {
typealias Value = Value
var value: Value {
didSet {
notifyObservers()
}
}
private var observers: [UUID: (Value) -> Void] = [:]
private var observerID = 0
private var observerIDLock = NSLock()
private var observerIDQueue = DispatchQueue(label: "ObservableProperty.observerIDQueue", attributes:.concurrent)
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
observerIDLock.lock()
defer { observerIDLock.unlock() }
let id = observerID
observerID += 1
observers[id] = observer
return id
}
func unsubscribe(_ observer: UUID) {
observerIDLock.lock()
defer { observerIDLock.unlock() }
observers[observer] = nil
}
private func notifyObservers() {
observerIDQueue.async { [weak self] in
guard let self = self else { return }
self.observers.forEach { $0.value(self.value) }
}
}
}```swift
protocol ObservablePropertyProtocol {
associatedtype Value
init(value: Value)
var value: Value { get set }
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
func unsubscribe(_ observer: UUID)
}
// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
typealias Value = Value
var value: Value {
didSet {
notifyObservers()
}
}
private var observers: [UUID: (Value) -> Void] = [:]
private var observerID = 0
private var observerIDLock = NSLock()
private var observerIDQueue = DispatchQueue(label: "ObservableProperty.observerIDQueue", attributes:.concurrent)
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
observerIDLock.lock()
defer { observerIDLock.unlock() }
let id = observerID
observerID += 1
observers[id] = observer
return id
}
func unsubscribe(_ observer: UUID) {
observerIDLock.lock()
defer { observerIDLock.unlock() }
observers[observer] = nil
}
private func notifyObservers() {
observerIDQueue.async { [weak self] in
guard let self = self else { return }
self.observers.forEach { $0.value(self.value) }
}
}
}
```init(value: Value) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ObservableProperty<Value>'observers[id] = observer // cannot convert value of type 'Int' to expected argument type 'UUID'return id // cannot convert return expression of type 'Int' to return type 'UUID'protocol ObservablePropertyProtocol {
associatedtype Value
init(value: Value)
var value: Value { get set }
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
func unsubscribe(_ observer: UUID)
}
class ObservableProperty<Value> : ObservablePropertyProtocol {
typealias Value = Value
var value: Value {
didSet {
for observer in observers {
observer(value)
}
}
}
private var observers: [UUID: (Value) -> Void] = [:]
private var observerId: UUID = 0
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
observerId += 1
observers[observerId] = observer
return observerId
}
func unsubscribe(_ observer: UUID) {
observers[observer] = nil
}
}```swift
protocol ObservablePropertyProtocol {
associatedtype Value
init(value: Value)
var value: Value { get set }
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
func unsubscribe(_ observer: UUID)
}
// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> : ObservablePropertyProtocol {
typealias Value = Value
var value: Value {
didSet {
for observer in observers {
observer(value)
}
}
}
private var observers: [UUID: (Value) -> Void] = [:]
private var observerId: UUID = 0
init(value: Value) {
self.value = value
}
func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
observerId += 1
observers[observerId] = observer
return observerId
}
func unsubscribe(_ observer: UUID) {
observers[observer] = nil
}
}
```observer(value) // cannot call value of non-function type '(key: UUID, value: (Value) -> Void)'private var observerId: UUID = 0 // cannot convert value of type 'Int' to specified type 'UUID'init(value: Value) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ObservableProperty<Value>'observerId += 1 // binary operator '+=' cannot be applied to operands of type 'UUID' and 'Int'protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable> {
var value: Value
let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.value = range.clamp(wrappedValue)
self.range = range
}
var wrappedValue: Value {
get { value }
set { value = range.clamp(newValue) }
}
}
extension Comparable {
func clamped(to range: ClosedRange<Self>) -> Self {
min(max(self, range.lowerBound), range.upperBound)
}
}
struct MyStruct {
@Clamped(wrappedValue: 10, 0...100) var myProperty: Int
}```swift
protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
// Property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Value: Comparable> {
var value: Value
let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.value = range.clamp(wrappedValue)
self.range = range
}
var wrappedValue: Value {
get { value }
set { value = range.clamp(newValue) }
}
}
// Extension to add clamping functionality to any type that conforms to Comparable.
extension Comparable {
func clamped(to range: ClosedRange<Self>) -> Self {
min(max(self, range.lowerBound), range.upperBound)
}
}
// Example usage:
struct MyStruct {
@Clamped(wrappedValue: 10, 0...100) var myProperty: Int
}
let myStruct = MyStruct()
myStruct.myProperty = 1000 // Clamps value to 100
```self.value = range.clamp(wrappedValue) // value of type 'ClosedRange<Value>' has no member 'clamp'set { value = range.clamp(newValue) } // value of type 'ClosedRange<Value>' has no member 'clamp'protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable> {
var range: ClosedRange<Value>
var value: Value
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.range = range
self.value = range.clamp(wrappedValue)
}
var wrappedValue: Value {
get { value }
set { value = range.clamp(newValue) }
}
}
extension Comparable {
func clamped(to range: ClosedRange<Self>) -> Self {
min(max(self, range.lowerBound), range.upperBound)
}
}```swift
protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
// Property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Value: Comparable> {
var range: ClosedRange<Value>
var value: Value
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.range = range
self.value = range.clamp(wrappedValue)
}
var wrappedValue: Value {
get { value }
set { value = range.clamp(newValue) }
}
}
// Extension to add clamping functionality to any type that conforms to Comparable.
extension Comparable {
func clamped(to range: ClosedRange<Self>) -> Self {
min(max(self, range.lowerBound), range.upperBound)
}
}
```self.value = range.clamp(wrappedValue) // value of type 'ClosedRange<Value>' has no member 'clamp'set { value = range.clamp(newValue) } // value of type 'ClosedRange<Value>' has no member 'clamp'protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable> {
private var value: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.value = range.clamped(wrappedValue)
self.range = range
}
var wrappedValue: Value {
get { value }
set { value = range.clamped(newValue) }
}
}
extension ClosedRange where Bound: Comparable {
func clamped(_ value: Bound) -> Bound {
lowerBound > value? lowerBound : upperBound < value? upperBound : value
}
}
struct Person: Codable {
@Clamped(0...100) var age: Int
}```swift
protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
// Property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Value: Comparable> {
private var value: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.value = range.clamped(wrappedValue)
self.range = range
}
var wrappedValue: Value {
get { value }
set { value = range.clamped(newValue) }
}
}
extension ClosedRange where Bound: Comparable {
func clamped(_ value: Bound) -> Bound {
lowerBound > value? lowerBound : upperBound < value? upperBound : value
}
}
struct Person: Codable {
@Clamped(0...100) var age: Int
}
let person = Person(age: 120)
print(person.age) // 100
```lowerBound > value? lowerBound : upperBound < value? upperBound : value // expression of type 'Bound' is unusedlowerBound > value? lowerBound : upperBound < value? upperBound : value // expected expressionlowerBound > value? lowerBound : upperBound < value? upperBound : value // cannot use optional chaining on non-optional value of type 'Bound'lowerBound > value? lowerBound : upperBound < value? upperBound : value // value of optional type 'Bound?' must be unwrapped to a value of type 'Bound'lowerBound > value? lowerBound : upperBound < value? upperBound : value // consecutive statements on a line must be separated by ';'lowerBound > value? lowerBound : upperBound < value? upperBound : value // consecutive statements on a line must be separated by ';'struct Person: Codable { // type 'Person' does not conform to protocol 'Encodable'struct Person: Codable { // type 'Person' does not conform to protocol 'Decodable'@Clamped(0...100) var age: Int // missing argument for parameter 'wrappedValue' in callprotocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable> {
let range: ClosedRange<Value>
var value: Value
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.range = range
self.value = range.clamp(wrappedValue)
}
}
extension Clamped: ClampedProtocol {
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.range = range
self.value = range.clamp(wrappedValue)
}
}
extension Clamped: Codable where Value: Codable {
init(from decoder: Decoder) throws {
let container = try decoder.singleValueContainer()
let value = try container.decode(Value.self)
self.value = range.clamp(value)
}
func encode(to encoder: Encoder) throws {
var container = encoder.singleValueContainer()
try container.encode(value)
}
}
extension Clamped: CustomStringConvertible {
var description: String {
return "\(value)"
}
}
extension Clamped: CustomDebugStringConvertible {
var debugDescription: String {
return "\(value)"
}
}
extension Clamped: Equatable where Value: Equatable {
static func == (lhs: Clamped, rhs: Clamped) -> Bool {
return lhs.value == rhs.value
}
}
extension Clamped: Hashable where Value: Hashable {
func hash(into hasher: inout Hasher) {
hasher.combine(value)
}
}
extension Clamped: Comparable where Value: Comparable {
static func < (lhs: Clamped, rhs: Clamped) -> Bool {
return lhs.value < rhs.value
}
}
extension Clamped: LosslessStringConvertible where Value: LosslessStringConvertible {
init?(_ description: String) {
guard let value = Value(description) else { return nil }
self.value = range.clamp(value)
}
}
extension Clamped: ExpressibleByFloatLiteral where Value: ExpressibleByFloatLiteral {
init(floatLiteral value: FloatLiteralType) {
self.value = range.clamp(Value(floatLiteral: value))
}
}
extension Clamped: ExpressibleByIntegerLiteral where Value: ExpressibleByIntegerLiteral {
init(integerLiteral value: IntegerLiteralType) {
self.value = range.clamp(Value(integerLiteral: value))
}
}
extension Clamped: ExpressibleByStringLiteral where Value: ExpressibleByStringLiteral {
init(stringLiteral value: StringLiteralType) {
self.value = range.clamp(Value(stringLiteral: value))
}
}
extension Clamped: ExpressibleByUnicodeScalarLiteral where Value: ExpressibleByUnicodeScalarLiteral {
init(unicodeScalarLiteral value: UnicodeScalarLiteralType) {
self.value = range.clamp(Value(unicodeScalarLiteral: value))
}
}
extension Clamped: ExpressibleByExtendedGraphemeClusterLiteral where Value: ExpressibleByExtendedGraphemeClusterLiteral {
init(extendedGraphemeClusterLiteral value: ExtendedGraphemeClusterLiteralType) {
self.value = range.clamp(Value(extendedGraphemeClusterLiteral: value))
}
}
extension Clamped: ExpressibleByBooleanLiteral where Value: ExpressibleByBooleanLiteral {
init(booleanLiteral value: BooleanLiteralType) {
self.value = range.clamp(Value(booleanLiteral: value))
}
}
extension Clamped: ExpressibleByNilLiteral where Value: ExpressibleByNilLiteral {
init(nilLiteral: ()) {
self.value = range.clamp(Value(nilLiteral: nil))
}
}```swift
protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
// Property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Value: Comparable> {
let range: ClosedRange<Value>
var value: Value
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.range = range
self.value = range.clamp(wrappedValue)
}
}
// Conform to `ClampedProtocol`
extension Clamped: ClampedProtocol {
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.range = range
self.value = range.clamp(wrappedValue)
}
}
// Conform to `Codable`
extension Clamped: Codable where Value: Codable {
init(from decoder: Decoder) throws {
let container = try decoder.singleValueContainer()
let value = try container.decode(Value.self)
self.value = range.clamp(value)
}
func encode(to encoder: Encoder) throws {
var container = encoder.singleValueContainer()
try container.encode(value)
}
}
// Conform to `CustomStringConvertible`
extension Clamped: CustomStringConvertible {
var description: String {
return "\(value)"
}
}
// Conform to `CustomDebugStringConvertible`
extension Clamped: CustomDebugStringConvertible {
var debugDescription: String {
return "\(value)"
}
}
// Conform to `Equatable`
extension Clamped: Equatable where Value: Equatable {
static func == (lhs: Clamped, rhs: Clamped) -> Bool {
return lhs.value == rhs.value
}
}
// Conform to `Hashable`
extension Clamped: Hashable where Value: Hashable {
func hash(into hasher: inout Hasher) {
hasher.combine(value)
}
}
// Conform to `Comparable`
extension Clamped: Comparable where Value: Comparable {
static func < (lhs: Clamped, rhs: Clamped) -> Bool {
return lhs.value < rhs.value
}
}
// Conform to `LosslessStringConvertible`
extension Clamped: LosslessStringConvertible where Value: LosslessStringConvertible {
init?(_ description: String) {
guard let value = Value(description) else { return nil }
self.value = range.clamp(value)
}
}
// Conform to `ExpressibleByFloatLiteral`
extension Clamped: ExpressibleByFloatLiteral where Value: ExpressibleByFloatLiteral {
init(floatLiteral value: FloatLiteralType) {
self.value = range.clamp(Value(floatLiteral: value))
}
}
// Conform to `ExpressibleByIntegerLiteral`
extension Clamped: ExpressibleByIntegerLiteral where Value: ExpressibleByIntegerLiteral {
init(integerLiteral value: IntegerLiteralType) {
self.value = range.clamp(Value(integerLiteral: value))
}
}
// Conform to `ExpressibleByStringLiteral`
extension Clamped: ExpressibleByStringLiteral where Value: ExpressibleByStringLiteral {
init(stringLiteral value: StringLiteralType) {
self.value = range.clamp(Value(stringLiteral: value))
}
}
// Conform to `ExpressibleByUnicodeScalarLiteral`
extension Clamped: ExpressibleByUnicodeScalarLiteral where Value: ExpressibleByUnicodeScalarLiteral {
init(unicodeScalarLiteral value: UnicodeScalarLiteralType) {
self.value = range.clamp(Value(unicodeScalarLiteral: value))
}
}
// Conform to `ExpressibleByExtendedGraphemeClusterLiteral`
extension Clamped: ExpressibleByExtendedGraphemeClusterLiteral where Value: ExpressibleByExtendedGraphemeClusterLiteral {
init(extendedGraphemeClusterLiteral value: ExtendedGraphemeClusterLiteralType) {
self.value = range.clamp(Value(extendedGraphemeClusterLiteral: value))
}
}
// Conform to `ExpressibleByBooleanLiteral`
extension Clamped: ExpressibleByBooleanLiteral where Value: ExpressibleByBooleanLiteral {
init(booleanLiteral value: BooleanLiteralType) {
self.value = range.clamp(Value(booleanLiteral: value))
}
}
// Conform to `ExpressibleByNilLiteral`
extension Clamped: ExpressibleByNilLiteral where Value: ExpressibleByNilLiteral {
init(nilLiteral: ()) {
self.value = range.clamp(Value(nilLiteral: nil))
}
}
// Conform to `ExpressibleBystruct Clamped<Value: Comparable> { // property wrapper type 'Clamped' does not contain a non-static property named 'wrappedValue'self.value = range.clamp(wrappedValue) // value of type 'ClosedRange<Value>' has no member 'clamp'init(wrappedValue: Value, _ range: ClosedRange<Value>) { // invalid redeclaration of 'init(wrappedValue:_:)'self.value = range.clamp(wrappedValue) // value of type 'ClosedRange<Value>' has no member 'clamp'self.value = range.clamp(value) // value of type 'ClosedRange<Value>' has no member 'clamp'self.value = range.clamp(value) // value of type 'ClosedRange<Value>' has no member 'clamp'self.value = range.clamp(Value(floatLiteral: value)) // value of type 'ClosedRange<Value>' has no member 'clamp'self.value = range.clamp(Value(floatLiteral: value)) // cannot convert value of type 'FloatLiteralType' (aka 'Double') to expected argument type 'Value.FloatLiteralType'self.value = range.clamp(Value(integerLiteral: value)) // value of type 'ClosedRange<Value>' has no member 'clamp'self.value = range.clamp(Value(integerLiteral: value)) // cannot convert value of type 'IntegerLiteralType' (aka 'Int') to expected argument type 'Value.IntegerLiteralType'self.value = range.clamp(Value(stringLiteral: value)) // value of type 'ClosedRange<Value>' has no member 'clamp'self.value = range.clamp(Value(stringLiteral: value)) // cannot convert value of type 'StringLiteralType' (aka 'String') to expected argument type 'Value.StringLiteralType'extension Clamped: ExpressibleByUnicodeScalarLiteral where Value: ExpressibleByUnicodeScalarLiteral { // type 'Clamped<Value>' does not conform to protocol 'ExpressibleByUnicodeScalarLiteral'self.value = range.clamp(Value(unicodeScalarLiteral: value)) // value of type 'ClosedRange<Value>' has no member 'clamp'extension Clamped: ExpressibleByExtendedGraphemeClusterLiteral where Value: ExpressibleByExtendedGraphemeClusterLiteral { // type 'Clamped<Value>' does not conform to protocol 'ExpressibleByExtendedGraphemeClusterLiteral'self.value = range.clamp(Value(extendedGraphemeClusterLiteral: value)) // value of type 'ClosedRange<Value>' has no member 'clamp'self.value = range.clamp(Value(booleanLiteral: value)) // cannot convert value of type 'BooleanLiteralType' (aka 'Bool') to expected argument type 'Value.BooleanLiteralType'self.value = range.clamp(Value(booleanLiteral: value)) // value of type 'ClosedRange<Value>' has no member 'clamp'self.value = range.clamp(Value(nilLiteral: nil)) // value of type 'ClosedRange<Value>' has no member 'clamp'self.value = range.clamp(Value(nilLiteral: nil)) // 'nil' is not compatible with expected argument type '()'protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable> {
private var value: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.value = range.clamp(wrappedValue)
self.range = range
}
var wrappedValue: Value {
get { value }
set { value = range.clamp(newValue) }
}
}
extension Clamped: Codable where Value: Codable {
init(from decoder: Decoder) throws {
let container = try decoder.singleValueContainer()
let value = try container.decode(Value.self)
self.init(wrappedValue: value, range)
}
func encode(to encoder: Encoder) throws {
var container = encoder.singleValueContainer()
try container.encode(wrappedValue)
}
}```swift
protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
// Property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Value: Comparable> {
private var value: Value
private let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.value = range.clamp(wrappedValue)
self.range = range
}
var wrappedValue: Value {
get { value }
set { value = range.clamp(newValue) }
}
}
// Conform to `ClampedProtocol` to make `Clamped` work with `Codable`.
extension Clamped: Codable where Value: Codable {
init(from decoder: Decoder) throws {
let container = try decoder.singleValueContainer()
let value = try container.decode(Value.self)
self.init(wrappedValue: value, range)
}
func encode(to encoder: Encoder) throws {
var container = encoder.singleValueContainer()
try container.encode(wrappedValue)
}
}
```self.value = range.clamp(wrappedValue) // value of type 'ClosedRange<Value>' has no member 'clamp'set { value = range.clamp(newValue) } // value of type 'ClosedRange<Value>' has no member 'clamp'protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable> {
var value: Value
let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.value = range.clamped(wrappedValue)
self.range = range
}
var wrappedValue: Value {
get { value }
set { value = range.clamped(newValue) }
}
}```swift
protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
// Property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Value: Comparable> {
var value: Value
let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.value = range.clamped(wrappedValue)
self.range = range
}
var wrappedValue: Value {
get { value }
set { value = range.clamped(newValue) }
}
}
```self.value = range.clamped(wrappedValue) // missing argument label 'to:' in callself.value = range.clamped(wrappedValue) // cannot assign value of type 'ClosedRange<Value>' to type 'Value'self.value = range.clamped(wrappedValue) // cannot convert value of type 'Value' to expected argument type 'ClosedRange<Value>'set { value = range.clamped(newValue) } // missing argument label 'to:' in callset { value = range.clamped(newValue) } // cannot assign value of type 'ClosedRange<Value>' to type 'Value'set { value = range.clamped(newValue) } // cannot convert value of type 'Value' to expected argument type 'ClosedRange<Value>'protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable> {
var value: Value
let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.value = range.clamp(wrappedValue)
self.range = range
}
var wrappedValue: Value {
get { value }
set { value = range.clamp(newValue) }
}
}```swift
protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
// Property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Value: Comparable> {
var value: Value
let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.value = range.clamp(wrappedValue)
self.range = range
}
var wrappedValue: Value {
get { value }
set { value = range.clamp(newValue) }
}
}
```self.value = range.clamp(wrappedValue) // value of type 'ClosedRange<Value>' has no member 'clamp'set { value = range.clamp(newValue) } // value of type 'ClosedRange<Value>' has no member 'clamp'protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable> {
var value: Value
let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.value = Value.clamped(to: range, wrappedValue)
self.range = range
}
var wrappedValue: Value {
get { value }
set { value = Value.clamped(to: range, newValue) }
}
}
extension Comparable {
static func clamped(to range: ClosedRange<Self>, _ value: Self) -> Self {
min(max(value, range.lowerBound), range.upperBound)
}
}
struct User {
@Clamped(0...100) var age: Int
}```swift
protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
// Property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Value: Comparable> {
var value: Value
let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.value = Value.clamped(to: range, wrappedValue)
self.range = range
}
var wrappedValue: Value {
get { value }
set { value = Value.clamped(to: range, newValue) }
}
}
extension Comparable {
static func clamped(to range: ClosedRange<Self>, _ value: Self) -> Self {
min(max(value, range.lowerBound), range.upperBound)
}
}
struct User {
@Clamped(0...100) var age: Int
}
let user = User(age: 101)
print(user.age) // 100
```@Clamped(0...100) var age: Int // missing argument for parameter 'wrappedValue' in callprotocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable> {
var value: Value
let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.value = range.clamped(wrappedValue)
self.range = range
}
var wrappedValue: Value {
get { value }
set { value = range.clamped(newValue) }
}
}
extension ClosedRange where Bound: Comparable {
func clamped(_ value: Bound) -> Bound {
min(max(value, lowerBound), upperBound)
}
}```swift
protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
// Property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Value: Comparable> {
var value: Value
let range: ClosedRange<Value>
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.value = range.clamped(wrappedValue)
self.range = range
}
var wrappedValue: Value {
get { value }
set { value = range.clamped(newValue) }
}
}
extension ClosedRange where Bound: Comparable {
func clamped(_ value: Bound) -> Bound {
min(max(value, lowerBound), upperBound)
}
}
```min(max(value, lowerBound), upperBound) // use of 'max' as reference to global function in module 'Swift' will change in future versions of Swift to reference instance method in generic struct 'ClosedRange' which comes via a conditional conformancemin(max(value, lowerBound), upperBound) // use of 'min' as reference to global function in module 'Swift' will change in future versions of Swift to reference instance method in generic struct 'ClosedRange' which comes via a conditional conformanceprotocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
@propertyWrapper
struct Clamped<Value: Comparable> {
var range: ClosedRange<Value>
var value: Value
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.range = range
self.value = range.clamp(wrappedValue)
}
var wrappedValue: Value {
get { value }
set { value = range.clamp(newValue) }
}
}
extension ClosedRange where Bound: Comparable {
func clamp(_ value: Bound) -> Bound {
return min(max(value, lowerBound), upperBound)
}
}
struct Person {
@Clamped(wrappedValue: 18, 0...100) var age: Int
}```swift
protocol ClampedProtocol {
associatedtype Value: Comparable
init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
// Property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Value: Comparable> {
var range: ClosedRange<Value>
var value: Value
init(wrappedValue: Value, _ range: ClosedRange<Value>) {
self.range = range
self.value = range.clamp(wrappedValue)
}
var wrappedValue: Value {
get { value }
set { value = range.clamp(newValue) }
}
}
extension ClosedRange where Bound: Comparable {
func clamp(_ value: Bound) -> Bound {
return min(max(value, lowerBound), upperBound)
}
}
struct Person {
@Clamped(wrappedValue: 18, 0...100) var age: Int
}
let person = Person()
person.age = 100
person.age = 10
person.age = -1
```return min(max(value, lowerBound), upperBound) // use of 'max' as reference to global function in module 'Swift' will change in future versions of Swift to reference instance method in generic struct 'ClosedRange' which comes via a conditional conformancereturn min(max(value, lowerBound), upperBound) // use of 'min' as reference to global function in module 'Swift' will change in future versions of Swift to reference instance method in generic struct 'ClosedRange' which comes via a conditional conformanceenum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value> {
var value: Value
var logger: (Event, Value) -> Void
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.value = wrappedValue
self.logger = logger
}
var wrappedValue: Value {
get { value }
set {
value = newValue
logger(.set, newValue)
}
}
}
struct User {
@Logged(logger: { print("User \($0) \($1)") })
var name: String
}```swift
enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<Value> {
var value: Value
var logger: (Event, Value) -> Void
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.value = wrappedValue
self.logger = logger
}
var wrappedValue: Value {
get { value }
set {
value = newValue
logger(.set, newValue)
}
}
}
struct User {
@Logged(logger: { print("User \($0) \($1)") })
var name: String
}
let user = User(name: "")
user.name = ""
```@Logged(logger: { print("User \($0) \($1)") }) // missing argument for parameter 'wrappedValue' in callenum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value> {
var wrappedValue: Value
var logger: (Event, Value) -> Void
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.wrappedValue = wrappedValue
self.logger = logger
}
}
extension Logged: LoggedProtocol {
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.init(wrappedValue: wrappedValue, logger: logger)
}
}
struct User {
@Logged(logger: { print("User \($0) \($1)") })
var name: String
}```swift
enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<Value> {
var wrappedValue: Value
var logger: (Event, Value) -> Void
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.wrappedValue = wrappedValue
self.logger = logger
}
}
extension Logged: LoggedProtocol {
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.init(wrappedValue: wrappedValue, logger: logger)
}
}
struct User {
@Logged(logger: { print("User \($0) \($1)") })
var name: String
}
var user = User(name: "")
user.name = ""
```init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) { // invalid redeclaration of 'init(wrappedValue:logger:)'@Logged(logger: { print("User \($0) \($1)") }) // missing argument for parameter 'wrappedValue' in callenum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value> {
private var value: Value
private let logger: (Event, Value) -> Void
var wrappedValue: Value {
get { value }
set {
value = newValue
logger(.set, newValue)
}
}
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.value = wrappedValue
self.logger = logger
}
}
extension LoggedProtocol {
var projectedValue: Logged<Value> {
Logged(wrappedValue: wrappedValue, logger: logger)
}
}
class LoggedClass<Value> {
private var value: Value
private let logger: (Event, Value) -> Void
var wrappedValue: Value {
get { value }
set {
value = newValue
logger(.set, newValue)
}
}
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.value = wrappedValue
self.logger = logger
}
}
class LoggedClass2<Value> {
private var value: Value
private let logger: (Event, Value) -> Void
var wrappedValue: Value {
get { value }
set {
value = newValue
logger(.set, newValue)
}
}
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.value = wrappedValue
self.logger = logger
}
}
struct LoggedStruct<Value> {
private var value: Value
private let logger: (Event, Value) -> Void
var wrappedValue: Value {
get { value }
set {
value = newValue
logger(.set, newValue)
}
}
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.value = wrappedValue
self.logger = logger
}
}
struct LoggedStruct2<Value> {
private var value: Value
private let logger: (Event, Value) -> Void
var wrappedValue: Value {
get { value }
set {
value = newValue
logger(.set, newValue)
}
}
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.value = wrappedValue
self.logger = logger
}
}
struct LoggedStruct3<Value> {
private var value: Value
private let logger: (Event, Value) -> Void
var wrappedValue: Value {
get { value }
set {
value = newValue
logger(.set, newValue)
}
}
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.value = wrappedValue
self.logger = logger
}
}
struct LoggedStruct4<Value> {
private var value: Value
private let logger: (Event, Value) -> Void
var wrappedValue: Value {
get { value }
set {
value = newValue
logger(.set, newValue)
}
}
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.value = wrappedValue
self.logger = logger
}
}
struct LoggedStruct5<Value> {
private var value: Value
private let logger: (Event, Value) -> Void
var wrappedValue: Value {
get { value }
set {
value = newValue
logger(.set, newValue)
}
}
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.value = wrappedValue
self.logger = logger
}
}```swift
enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<Value> {
private var value: Value
private let logger: (Event, Value) -> Void
var wrappedValue: Value {
get { value }
set {
value = newValue
logger(.set, newValue)
}
}
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.value = wrappedValue
self.logger = logger
}
}
// A protocol that can be used to log access and modification of a property.
extension LoggedProtocol {
var projectedValue: Logged<Value> {
Logged(wrappedValue: wrappedValue, logger: logger)
}
}
// A class that can be used to log access and modification of a property.
class LoggedClass<Value> {
private var value: Value
private let logger: (Event, Value) -> Void
var wrappedValue: Value {
get { value }
set {
value = newValue
logger(.set, newValue)
}
}
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.value = wrappedValue
self.logger = logger
}
}
// A class that can be used to log access and modification of a property.
class LoggedClass2<Value> {
private var value: Value
private let logger: (Event, Value) -> Void
var wrappedValue: Value {
get { value }
set {
value = newValue
logger(.set, newValue)
}
}
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.value = wrappedValue
self.logger = logger
}
}
// A struct that can be used to log access and modification of a property.
struct LoggedStruct<Value> {
private var value: Value
private let logger: (Event, Value) -> Void
var wrappedValue: Value {
get { value }
set {
value = newValue
logger(.set, newValue)
}
}
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.value = wrappedValue
self.logger = logger
}
}
// A struct that can be used to log access and modification of a property.
struct LoggedStruct2<Value> {
private var value: Value
private let logger: (Event, Value) -> Void
var wrappedValue: Value {
get { value }
set {
value = newValue
logger(.set, newValue)
}
}
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.value = wrappedValue
self.logger = logger
}
}
// A struct that can be used to log access and modification of a property.
struct LoggedStruct3<Value> {
private var value: Value
private let logger: (Event, Value) -> Void
var wrappedValue: Value {
get { value }
set {
value = newValue
logger(.set, newValue)
}
}
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.value = wrappedValue
self.logger = logger
}
}
// A struct that can be used to log access and modification of a property.
struct LoggedStruct4<Value> {
private var value: Value
private let logger: (Event, Value) -> Void
var wrappedValue: Value {
get { value }
set {
value = newValue
logger(.set, newValue)
}
}
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.value = wrappedValue
self.logger = logger
}
}
// A struct that can be used to log access and modification of a property.
struct LoggedStruct5<Value> {
private var value: Value
private let logger: (Event, Value) -> Void
var wrappedValue: Value {
get { value }
set {
value = newValue
logger(.set, newValue)
}
}
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.value = wrappedValue
self.logger = logger
}
}
// A struct that can be used to log access and modification of a property.
struct LoggedStruct6<Value> {
private var value: Value
private let logger: (Event, Value) -> Void
var wrappedValue: Value {
get { value }
set {
value = newValue
logger(.set,Logged(wrappedValue: wrappedValue, logger: logger) // cannot find 'logger' in scopeLogged(wrappedValue: wrappedValue, logger: logger) // cannot find 'wrappedValue' in scopeenum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value> : LoggedProtocol {
var wrappedValue: Value
var logger: (Event, Value) -> Void
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.wrappedValue = wrappedValue
self.logger = logger
}
// The property's value is accessed.
var wrappedValue: Value {
get {
logger(.get, wrappedValue)
return wrappedValue
}
set {
logger(.set, newValue)
wrappedValue = newValue
}
}
}
class User {
@Logged(logger: { print("Event: \($0), value: \($1)") })
var name: String = ""
}```swift
enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<Value> : LoggedProtocol {
var wrappedValue: Value
var logger: (Event, Value) -> Void
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.wrappedValue = wrappedValue
self.logger = logger
}
// The property's value is accessed.
var wrappedValue: Value {
get {
logger(.get, wrappedValue)
return wrappedValue
}
set {
logger(.set, newValue)
wrappedValue = newValue
}
}
}
// A class that uses the Logged property wrapper.
class User {
@Logged(logger: { print("Event: \($0), value: \($1)") })
var name: String = ""
}
// Create an instance of the class.
let user = User()
// Access the property.
user.name
// Modify the property.
user.name = ""
```struct Logged<Value> : LoggedProtocol { // property wrapper type 'Logged' has multiple non-static properties named 'wrappedValue'var wrappedValue: Value { // invalid redeclaration of 'wrappedValue'enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value> : LoggedProtocol {
var wrappedValue: Value
var logger: (Event, Value) -> Void
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.wrappedValue = wrappedValue
self.logger = logger
}
// The property's value is accessed.
var projectedValue: Logged<Value> {
get {
logger(.get, wrappedValue)
return self
}
set {
wrappedValue = newValue.wrappedValue
logger(.set, wrappedValue)
}
}
}
struct User {
@Logged(logger: { event, value in
print("User: \(event) \(value)")
})
var name: String
}```swift
enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<Value> : LoggedProtocol {
var wrappedValue: Value
var logger: (Event, Value) -> Void
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.wrappedValue = wrappedValue
self.logger = logger
}
// The property's value is accessed.
var projectedValue: Logged<Value> {
get {
logger(.get, wrappedValue)
return self
}
set {
wrappedValue = newValue.wrappedValue
logger(.set, wrappedValue)
}
}
}
// A structure that uses the Logged property wrapper.
struct User {
@Logged(logger: { event, value in
print("User: \(event) \(value)")
})
var name: String
}
let user = User(name: "")
user.name = ""
```@Logged(logger: { event, value in // missing argument for parameter 'wrappedValue' in callenum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value> {
private var value: Value
private let logger: (Event, Value) -> Void
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.value = wrappedValue
self.logger = logger
}
var wrappedValue: Value {
get { value }
set {
logger(.set, newValue)
value = newValue
}
}
}
struct User: LoggedProtocol {
@Logged(logger: { print("User \($0) \($1)") }) var name: String
}```swift
enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<Value> {
private var value: Value
private let logger: (Event, Value) -> Void
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.value = wrappedValue
self.logger = logger
}
var wrappedValue: Value {
get { value }
set {
logger(.set, newValue)
value = newValue
}
}
}
struct User: LoggedProtocol {
@Logged(logger: { print("User \($0) \($1)") }) var name: String
}
let user = User(name: "")
user.name = ""
```struct User: LoggedProtocol { // type 'User' does not conform to protocol 'LoggedProtocol'@Logged(logger: { print("User \($0) \($1)") }) var name: String // missing argument for parameter 'wrappedValue' in callenum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value> {
var value: Value
var logger: (Event, Value) -> Void
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.value = wrappedValue
self.logger = logger
}
var wrappedValue: Value {
get { value }
set {
logger(.set, newValue)
value = newValue
}
}
}
struct User {
@Logged(logger: { event, value in
print("User: \(event) \(value)")
})
var name: String
}```swift
enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<Value> {
var value: Value
var logger: (Event, Value) -> Void
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.value = wrappedValue
self.logger = logger
}
var wrappedValue: Value {
get { value }
set {
logger(.set, newValue)
value = newValue
}
}
}
struct User {
@Logged(logger: { event, value in
print("User: \(event) \(value)")
})
var name: String
}
var user = User(name: "")
user.name = ""
```@Logged(logger: { event, value in // missing argument for parameter 'wrappedValue' in callenum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value> {
var value: Value
var logger: (Event, Value) -> Void
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.value = wrappedValue
self.logger = logger
}
var wrappedValue: Value {
get {
logger(.get, value)
return value
}
set {
logger(.set, newValue)
value = newValue
}
}
}
struct User {
@Logged(logger: { print("User \($0) \($1)") })
var name: String
}```swift
enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<Value> {
var value: Value
var logger: (Event, Value) -> Void
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.value = wrappedValue
self.logger = logger
}
var wrappedValue: Value {
get {
logger(.get, value)
return value
}
set {
logger(.set, newValue)
value = newValue
}
}
}
struct User {
@Logged(logger: { print("User \($0) \($1)") })
var name: String
}
var user = User(name: "")
user.name = ""
```@Logged(logger: { print("User \($0) \($1)") }) // missing argument for parameter 'wrappedValue' in callenum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value> {
var wrappedValue: Value
var logger: (Event, Value) -> Void
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.wrappedValue = wrappedValue
self.logger = logger
}
}
extension Logged: LoggedProtocol {
var projectedValue: Logged<Value> { self }
}
extension Logged: DynamicProperty {
var wrappedValue: Value {
get { wrappedValue }
set {
wrappedValue = newValue
logger(.set, newValue)
}
}
}
extension Logged: CustomStringConvertible {
var description: String {
"Logged(\(wrappedValue))"
}
}
extension Logged: CustomDebugStringConvertible {
var debugDescription: String {
"Logged(\(wrappedValue))"
}
}
struct User {
@Logged(logger: { print("User \($0) \($1)") }) var name: String
}```swift
enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<Value> {
var wrappedValue: Value
var logger: (Event, Value) -> Void
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.wrappedValue = wrappedValue
self.logger = logger
}
}
extension Logged: LoggedProtocol {
var projectedValue: Logged<Value> { self }
}
extension Logged: DynamicProperty {
var wrappedValue: Value {
get { wrappedValue }
set {
wrappedValue = newValue
logger(.set, newValue)
}
}
}
extension Logged: CustomStringConvertible {
var description: String {
"Logged(\(wrappedValue))"
}
}
extension Logged: CustomDebugStringConvertible {
var debugDescription: String {
"Logged(\(wrappedValue))"
}
}
// Usage:
struct User {
@Logged(logger: { print("User \($0) \($1)") }) var name: String
}
let user = User(name: "")
print(user.name)
// Prints "User get "
user.name = ""
// Prints "User set "
```extension Logged: DynamicProperty { // cannot find type 'DynamicProperty' in scopevar wrappedValue: Value { // invalid redeclaration of 'wrappedValue'@Logged(logger: { print("User \($0) \($1)") }) var name: String // missing argument for parameter 'wrappedValue' in callenum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
@propertyWrapper
struct Logged<Value> {
private var value: Value
private let logger: (Event, Value) -> Void
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.value = wrappedValue
self.logger = logger
}
var wrappedValue: Value {
get { value }
set {
value = newValue
logger(.set, newValue)
}
}
}
struct User: LoggedProtocol {
var id: Int
var name: String
init(id: Int, name: String) {
self.id = id
self.name = name
}
init(wrappedValue: User, logger: @escaping (Event, User) -> Void) {
self.init(id: wrappedValue.id, name: wrappedValue.name)
logger(.get, wrappedValue)
}
}
struct User2: LoggedProtocol {
var id: Int
var name: String
init(id: Int, name: String) {
self.id = id
self.name = name
}
init(wrappedValue: User2, logger: @escaping (Event, User2) -> Void) {
self.init(id: wrappedValue.id, name: wrappedValue.name)
logger(.get, wrappedValue)
}
}
struct User3: LoggedProtocol {
var id: Int
var name: String
init(id: Int, name: String) {
self.id = id
self.name = name
}
init(wrappedValue: User3, logger: @escaping (Event, User3) -> Void) {
self.init(id: wrappedValue.id, name: wrappedValue.name)
logger(.get, wrappedValue)
}
}
struct User4: LoggedProtocol {
var id: Int
var name: String
init(id: Int, name: String) {
self.id = id
self.name = name
}
init(wrappedValue: User4, logger: @escaping (Event, User4) -> Void) {
self.init(id: wrappedValue.id, name: wrappedValue.name)
logger(.get, wrappedValue)
}
}
struct User5: LoggedProtocol {
var id: Int
var name: String
init(id: Int, name: String) {
self.id = id
self.name = name
}
init(wrappedValue: User5, logger: @escaping (Event, User5) -> Void) {
self.init(id: wrappedValue.id, name: wrappedValue.name)
logger(.get, wrappedValue)
}
}
struct User6: LoggedProtocol {
var id: Int
var name: String
init(id: Int, name: String) {
self.id = id
self.name = name
}
init(wrappedValue: User6, logger: @escaping (Event, User6) -> Void) {
self.init(id: wrappedValue.id, name: wrappedValue.name)
logger(.get, wrappedValue)
}
}
struct User7: LoggedProtocol {
var id: Int
var name: String
init(id: Int, name: String) {
self.id = id
self.name = name
}
init(wrappedValue: User7, logger: @escaping (Event, User7) -> Void) {
self.init(id: wrappedValue.id, name: wrappedValue.name)
logger(.get, wrappedValue)
}
}
struct User8: LoggedProtocol {
var id: Int
var name: String
init(id: Int, name: String) {
self.id = id
self.name = name
}
init(wrappedValue: User8, logger: @escaping (Event, User8) -> Void) {
self.init(id: wrappedValue.id, name: wrappedValue.name)
logger(.get, wrappedValue)
}
}```swift
enum Event {
case get, set
}
protocol LoggedProtocol {
associatedtype Value
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<Value> {
private var value: Value
private let logger: (Event, Value) -> Void
init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
self.value = wrappedValue
self.logger = logger
}
var wrappedValue: Value {
get { value }
set {
value = newValue
logger(.set, newValue)
}
}
}
// A type that conforms to the LoggedProtocol.
struct User: LoggedProtocol {
var id: Int
var name: String
init(id: Int, name: String) {
self.id = id
self.name = name
}
init(wrappedValue: User, logger: @escaping (Event, User) -> Void) {
self.init(id: wrappedValue.id, name: wrappedValue.name)
logger(.get, wrappedValue)
}
}
// A type that conforms to the LoggedProtocol.
struct User2: LoggedProtocol {
var id: Int
var name: String
init(id: Int, name: String) {
self.id = id
self.name = name
}
init(wrappedValue: User2, logger: @escaping (Event, User2) -> Void) {
self.init(id: wrappedValue.id, name: wrappedValue.name)
logger(.get, wrappedValue)
}
}
// A type that conforms to the LoggedProtocol.
struct User3: LoggedProtocol {
var id: Int
var name: String
init(id: Int, name: String) {
self.id = id
self.name = name
}
init(wrappedValue: User3, logger: @escaping (Event, User3) -> Void) {
self.init(id: wrappedValue.id, name: wrappedValue.name)
logger(.get, wrappedValue)
}
}
// A type that conforms to the LoggedProtocol.
struct User4: LoggedProtocol {
var id: Int
var name: String
init(id: Int, name: String) {
self.id = id
self.name = name
}
init(wrappedValue: User4, logger: @escaping (Event, User4) -> Void) {
self.init(id: wrappedValue.id, name: wrappedValue.name)
logger(.get, wrappedValue)
}
}
// A type that conforms to the LoggedProtocol.
struct User5: LoggedProtocol {
var id: Int
var name: String
init(id: Int, name: String) {
self.id = id
self.name = name
}
init(wrappedValue: User5, logger: @escaping (Event, User5) -> Void) {
self.init(id: wrappedValue.id, name: wrappedValue.name)
logger(.get, wrappedValue)
}
}
// A type that conforms to the LoggedProtocol.
struct User6: LoggedProtocol {
var id: Int
var name: String
init(id: Int, name: String) {
self.id = id
self.name = name
}
init(wrappedValue: User6, logger: @escaping (Event, User6) -> Void) {
self.init(id: wrappedValue.id, name: wrappedValue.name)
logger(.get, wrappedValue)
}
}
// A type that conforms to the LoggedProtocol.
struct User7: LoggedProtocol {
var id: Int
var name: String
init(id: Int, name: String) {
self.id = id
self.name = name
}
init(wrappedValue: User7, logger: @escaping (Event, User7) -> Void) {
self.init(id: wrappedValue.id, name: wrappedValue.name)
logger(.get, wrappedValue)
}
}
// A type that conforms to the LoggedProtocol.
struct User8: LoggedProtocol {
var id: Int
var name: String
init(id: Int, name: String) {
self.id = id
self.name = name
}
init(wrappedValue: User8, logger: @escaping (Event, User8) -> Void) {
self.init(id: wrappedValue.id, name: wrappedValue.name)
logger(.get, wrappedValue)
}
}
// A type that conforms to the LoggedProtocol.
struct // XCTAssertEqual failed: ([]) is not equal to (["Accessing value: 0"])protocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
return.success(city: character, forecast: "Forecast: \(character)")
case.keyboardDeleteBackwards:
return.failure(city: "No city")
case.searchButtonPress:
return.failure(city: "No city")
}
}
}```swift
protocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
return.success(city: character, forecast: "Forecast: \(character)")
case.keyboardDeleteBackwards:
return.failure(city: "No city")
case.searchButtonPress:
return.failure(city: "No city")
}
}
}
```return.success(city: character, forecast: "Forecast: \(character)") // cannot convert value of type 'Character' to expected argument type 'String'protocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
return.success(city: character, forecast: "Forecast")
case.keyboardDeleteBackwards:
return.success(city: "City", forecast: "Forecast")
case.searchButtonPress:
return.failure(city: "City")
}
}
}```swift
protocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
return.success(city: character, forecast: "Forecast")
case.keyboardDeleteBackwards:
return.success(city: "City", forecast: "Forecast")
case.searchButtonPress:
return.failure(city: "City")
}
}
}
```return.success(city: character, forecast: "Forecast") // cannot convert value of type 'Character' to expected argument type 'String'protocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
return.success(city: "London", forecast: "Sunny")
case.keyboardDeleteBackwards:
return.failure(city: "London")
case.searchButtonPress:
return.success(city: "London", forecast: "Sunny")
}
}
}```swift
protocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
return.success(city: "London", forecast: "Sunny")
case.keyboardDeleteBackwards:
return.failure(city: "London")
case.searchButtonPress:
return.success(city: "London", forecast: "Sunny")
}
}
}
```case.keyboardCharacterSelect(let character): // immutable value 'character' was never used; consider replacing with '_' or removing it // XCTAssertNil failed: expression is not nilprotocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
return.success(city: "London", forecast: "Sunny")
case.keyboardDeleteBackwards:
return.success(city: "London", forecast: "Sunny")
case.searchButtonPress:
return.success(city: "London", forecast: "Sunny")
}
}
}```swift
protocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
return.success(city: "London", forecast: "Sunny")
case.keyboardDeleteBackwards:
return.success(city: "London", forecast: "Sunny")
case.searchButtonPress:
return.success(city: "London", forecast: "Sunny")
}
}
}
```case.keyboardCharacterSelect(let character): // immutable value 'character' was never used; consider replacing with '_' or removing it // XCTAssertNil failed: expression is not nilprotocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
return.success(city: "London", forecast: "Sunny")
case.keyboardDeleteBackwards:
return.success(city: "London", forecast: "Sunny")
case.searchButtonPress:
return.success(city: "London", forecast: "Sunny")
}
}
}```swift
protocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
return.success(city: "London", forecast: "Sunny")
case.keyboardDeleteBackwards:
return.success(city: "London", forecast: "Sunny")
case.searchButtonPress:
return.success(city: "London", forecast: "Sunny")
}
}
}
```case.keyboardCharacterSelect(let character): // immutable value 'character' was never used; consider replacing with '_' or removing it // XCTAssertNil failed: expression is not nilprotocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
return.success(city: "London", forecast: "Sunny")
case.keyboardDeleteBackwards:
return.success(city: "London", forecast: "Sunny")
case.searchButtonPress:
return.success(city: "London", forecast: "Sunny")
}
}
}```swift
protocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
return.success(city: "London", forecast: "Sunny")
case.keyboardDeleteBackwards:
return.success(city: "London", forecast: "Sunny")
case.searchButtonPress:
return.success(city: "London", forecast: "Sunny")
}
}
}
```case.keyboardCharacterSelect(let character): // immutable value 'character' was never used; consider replacing with '_' or removing it // XCTAssertNil failed: expression is not nilprotocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
return.success(city: "London", forecast: "Sunny")
case.keyboardDeleteBackwards:
return.success(city: "London", forecast: "Sunny")
case.searchButtonPress:
return.success(city: "London", forecast: "Sunny")
}
}
}```swift
protocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
return.success(city: "London", forecast: "Sunny")
case.keyboardDeleteBackwards:
return.success(city: "London", forecast: "Sunny")
case.searchButtonPress:
return.success(city: "London", forecast: "Sunny")
}
}
}
```case.keyboardCharacterSelect(let character): // immutable value 'character' was never used; consider replacing with '_' or removing it // XCTAssertNil failed: expression is not nilprotocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
return.success(city: "London", forecast: "Sunny")
case.keyboardDeleteBackwards:
return.failure(city: "London")
case.searchButtonPress:
return.success(city: "London", forecast: "Sunny")
}
}
}```swift
protocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
return.success(city: "London", forecast: "Sunny")
case.keyboardDeleteBackwards:
return.failure(city: "London")
case.searchButtonPress:
return.success(city: "London", forecast: "Sunny")
}
}
}
```case.keyboardCharacterSelect(let character): // immutable value 'character' was never used; consider replacing with '_' or removing it // XCTAssertNil failed: expression is not nilprotocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
return.success(city: "London", forecast: "Sunny")
case.keyboardDeleteBackwards:
return.success(city: "London", forecast: "Sunny")
case.searchButtonPress:
return.success(city: "London", forecast: "Sunny")
}
}
}```swift
protocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
return.success(city: "London", forecast: "Sunny")
case.keyboardDeleteBackwards:
return.success(city: "London", forecast: "Sunny")
case.searchButtonPress:
return.success(city: "London", forecast: "Sunny")
}
}
}
```case.keyboardCharacterSelect(let character): // immutable value 'character' was never used; consider replacing with '_' or removing it // XCTAssertNil failed: expression is not nilprotocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
return.success(city: "London", forecast: "Sunny")
case.keyboardDeleteBackwards:
return.success(city: "London", forecast: "Sunny")
case.searchButtonPress:
return.success(city: "London", forecast: "Sunny")
}
}
}```swift
protocol WeatherProvider {
func forecast(for city: String) throws -> String
}
enum UserAction {
case keyboardCharacterSelect(Character)
case keyboardDeleteBackwards
case searchButtonPress
}
enum ApplicationFeedback: Equatable {
case success(city: String, forecast: String)
case failure(city: String)
}
protocol WeatherApplicationDependencies {
init(provider: WeatherProvider)
}
protocol WeatherApplicationInteractions {
func handle(action: UserAction) -> ApplicationFeedback?
}
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions
// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
private let provider: WeatherProvider
required init(provider: WeatherProvider) {
self.provider = provider
}
func handle(action: UserAction) -> ApplicationFeedback? {
switch action {
case.keyboardCharacterSelect(let character):
return.success(city: "London", forecast: "Sunny")
case.keyboardDeleteBackwards:
return.success(city: "London", forecast: "Sunny")
case.searchButtonPress:
return.success(city: "London", forecast: "Sunny")
}
}
}
```case.keyboardCharacterSelect(let character): // immutable value 'character' was never used; consider replacing with '_' or removing it // XCTAssertNil failed: expression is not nilprotocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
actor BankAccount: BankAccountProtocol {
private var _balance: Double
private var lock = Lock()
init(balance: Double) {
_balance = balance
}
var balance: Double {
lock.withLock { _balance }
}
func deposit(amount: Double) async {
lock.withLock { _balance += amount }
}
func withdraw(amount: Double) async -> Bool {
lock.withLock {
if _balance >= amount {
_balance -= amount
return true
} else {
return false
}
}
}
}```swift
protocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
private var _balance: Double
private var lock = Lock()
init(balance: Double) {
_balance = balance
}
var balance: Double {
lock.withLock { _balance }
}
func deposit(amount: Double) async {
lock.withLock { _balance += amount }
}
func withdraw(amount: Double) async -> Bool {
lock.withLock {
if _balance >= amount {
_balance -= amount
return true
} else {
return false
}
}
}
}
```private var lock = Lock() // cannot find 'Lock' in scopeprotocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
actor BankAccount: BankAccountProtocol {
private var _balance: Double
init(balance: Double) {
self._balance = balance
}
var balance: Double {
get async {
await _balance
}
}
func deposit(amount: Double) async {
await _balance.modify { $0 += amount }
}
func withdraw(amount: Double) async -> Bool {
guard await _balance >= amount else {
return false
}
await _balance.modify { $0 -= amount }
return true
}
}```swift
protocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
private var _balance: Double
init(balance: Double) {
self._balance = balance
}
var balance: Double {
get async {
await _balance
}
}
func deposit(amount: Double) async {
await _balance.modify { $0 += amount }
}
func withdraw(amount: Double) async -> Bool {
guard await _balance >= amount else {
return false
}
await _balance.modify { $0 -= amount }
return true
}
}
// Example usage
let account = BankAccount(balance: 100.0)
// Asynchronous deposit
await account.deposit(amount: 100.0)
// Asynchronous withdrawal
let success = await account.withdraw(amount: 50.0)
// Asynchronous balance check
let balance = await account.balance
```await _balance // no 'async' operations occur within 'await' expressionawait _balance.modify { $0 += amount } // value of type 'Double' has no member 'modify'guard await _balance >= amount else { // no 'async' operations occur within 'await' expressionawait _balance.modify { $0 -= amount } // value of type 'Double' has no member 'modify'protocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
actor BankAccount: BankAccountProtocol {
private var _balance: Double
init(balance: Double) {
self._balance = balance
}
var balance: Double {
get async {
await _balance
}
}
func deposit(amount: Double) async {
await _balance.modify { $0 += amount }
}
func withdraw(amount: Double) async -> Bool {
guard await _balance >= amount else {
return false
}
await _balance.modify { $0 -= amount }
return true
}
}```swift
protocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
private var _balance: Double
init(balance: Double) {
self._balance = balance
}
var balance: Double {
get async {
await _balance
}
}
func deposit(amount: Double) async {
await _balance.modify { $0 += amount }
}
func withdraw(amount: Double) async -> Bool {
guard await _balance >= amount else {
return false
}
await _balance.modify { $0 -= amount }
return true
}
}
```await _balance // no 'async' operations occur within 'await' expressionawait _balance.modify { $0 += amount } // value of type 'Double' has no member 'modify'guard await _balance >= amount else { // no 'async' operations occur within 'await' expressionawait _balance.modify { $0 -= amount } // value of type 'Double' has no member 'modify'protocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
actor BankAccount: BankAccountProtocol {
private var _balance: Double
init(balance: Double) {
_balance = balance
}
var balance: Double {
get async {
await _balance
}
}
func deposit(amount: Double) async {
await _balance.modify { $0 += amount }
}
func withdraw(amount: Double) async -> Bool {
guard await _balance >= amount else { return false }
await _balance.modify { $0 -= amount }
return true
}
}```swift
protocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
private var _balance: Double
init(balance: Double) {
_balance = balance
}
var balance: Double {
get async {
await _balance
}
}
func deposit(amount: Double) async {
await _balance.modify { $0 += amount }
}
func withdraw(amount: Double) async -> Bool {
guard await _balance >= amount else { return false }
await _balance.modify { $0 -= amount }
return true
}
}
// Usage example:
let account = BankAccount(balance: 100.0)
// Asynchronous deposit
Task {
await account.deposit(amount: 10.0)
}
// Asynchronous withdrawal
Task {
let success = await account.withdraw(amount: 5.0)
print("Withdrawal successful: \(success)")
}
// Asynchronous balance check
Task {
let balance = await account.balance
print("Current balance: \(balance)")
}
```await _balance // no 'async' operations occur within 'await' expressionawait _balance.modify { $0 += amount } // value of type 'Double' has no member 'modify'guard await _balance >= amount else { return false } // no 'async' operations occur within 'await' expressionawait _balance.modify { $0 -= amount } // value of type 'Double' has no member 'modify'protocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
actor BankAccount: BankAccountProtocol {
private var _balance: Double
private let lock = Lock()
init(balance: Double) {
_balance = balance
}
var balance: Double {
lock.withLock { _balance }
}
func deposit(amount: Double) async {
lock.withLock { _balance += amount }
}
func withdraw(amount: Double) async -> Bool {
lock.withLock {
guard _balance >= amount else { return false }
_balance -= amount
return true
}
}
}```swift
protocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
private var _balance: Double
private let lock = Lock()
init(balance: Double) {
_balance = balance
}
var balance: Double {
lock.withLock { _balance }
}
func deposit(amount: Double) async {
lock.withLock { _balance += amount }
}
func withdraw(amount: Double) async -> Bool {
lock.withLock {
guard _balance >= amount else { return false }
_balance -= amount
return true
}
}
}
```private let lock = Lock() // cannot find 'Lock' in scopeprotocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
actor BankAccount: BankAccountProtocol {
private var _balance: Double
private var lock = Lock()
init(balance: Double) {
_balance = balance
}
var balance: Double {
lock.withLock { _balance }
}
func deposit(amount: Double) async {
lock.withLock { _balance += amount }
}
func withdraw(amount: Double) async -> Bool {
lock.withLock {
guard _balance >= amount else { return false }
_balance -= amount
return true
}
}
}```swift
protocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
private var _balance: Double
private var lock = Lock()
init(balance: Double) {
_balance = balance
}
var balance: Double {
lock.withLock { _balance }
}
func deposit(amount: Double) async {
lock.withLock { _balance += amount }
}
func withdraw(amount: Double) async -> Bool {
lock.withLock {
guard _balance >= amount else { return false }
_balance -= amount
return true
}
}
}
```private var lock = Lock() // cannot find 'Lock' in scopeprotocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
actor BankAccount: BankAccountProtocol {
private var _balance: Double
init(balance: Double) {
self._balance = balance
}
var balance: Double {
get async {
await _balance
}
}
func deposit(amount: Double) async {
await _balance.modify { $0 += amount }
}
func withdraw(amount: Double) async -> Bool {
guard await _balance.modify { $0 -= amount } else {
return false
}
return true
}
}```swift
protocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
private var _balance: Double
init(balance: Double) {
self._balance = balance
}
var balance: Double {
get async {
await _balance
}
}
func deposit(amount: Double) async {
await _balance.modify { $0 += amount }
}
func withdraw(amount: Double) async -> Bool {
guard await _balance.modify { $0 -= amount } else {
return false
}
return true
}
}
```await _balance // no 'async' operations occur within 'await' expressionawait _balance.modify { $0 += amount } // value of type 'Double' has no member 'modify'guard await _balance.modify { $0 -= amount } else { // expected 'else' after 'guard' conditionguard await _balance.modify { $0 -= amount } else { // consecutive statements on a line must be separated by ';'guard await _balance.modify { $0 -= amount } else { // anonymous closure argument not contained in a closureguard await _balance.modify { $0 -= amount } else { // expected expressionguard await _balance.modify { $0 -= amount } else { // value of type 'Double' has no member 'modify'guard await _balance.modify { $0 -= amount } else { // no 'async' operations occur within 'await' expressionprotocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
actor BankAccount: BankAccountProtocol {
private var _balance: Double
private let lock = Lock()
init(balance: Double) {
_balance = balance
}
var balance: Double {
lock.withLock { _balance }
}
func deposit(amount: Double) async {
lock.withLock { _balance += amount }
}
func withdraw(amount: Double) async -> Bool {
lock.withLock {
guard _balance >= amount else { return false }
_balance -= amount
return true
}
}
}```swift
protocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
private var _balance: Double
private let lock = Lock()
init(balance: Double) {
_balance = balance
}
var balance: Double {
lock.withLock { _balance }
}
func deposit(amount: Double) async {
lock.withLock { _balance += amount }
}
func withdraw(amount: Double) async -> Bool {
lock.withLock {
guard _balance >= amount else { return false }
_balance -= amount
return true
}
}
}
```private let lock = Lock() // cannot find 'Lock' in scopeprotocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
actor BankAccount: BankAccountProtocol {
private var _balance: Double
private let lock = Lock()
init(balance: Double) {
_balance = balance
}
var balance: Double {
lock.withLock { _balance }
}
func deposit(amount: Double) async {
lock.withLock { _balance += amount }
}
func withdraw(amount: Double) async -> Bool {
lock.withLock {
if _balance >= amount {
_balance -= amount
return true
} else {
return false
}
}
}
}```swift
protocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
private var _balance: Double
private let lock = Lock()
init(balance: Double) {
_balance = balance
}
var balance: Double {
lock.withLock { _balance }
}
func deposit(amount: Double) async {
lock.withLock { _balance += amount }
}
func withdraw(amount: Double) async -> Bool {
lock.withLock {
if _balance >= amount {
_balance -= amount
return true
} else {
return false
}
}
}
}
```private let lock = Lock() // cannot find 'Lock' in scopeprotocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
actor BankAccount: BankAccountProtocol {
private var _balance: Double
private var lock = Lock()
init(balance: Double) {
_balance = balance
}
var balance: Double {
lock.withLock { _balance }
}
func deposit(amount: Double) async {
lock.withLock { _balance += amount }
}
func withdraw(amount: Double) async -> Bool {
lock.withLock {
guard _balance >= amount else { return false }
_balance -= amount
return true
}
}
}```swift
protocol BankAccountProtocol {
init(balance: Double)
var balance: Double { get async }
func deposit(amount: Double) async
func withdraw(amount: Double) async -> Bool
}
// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
private var _balance: Double
private var lock = Lock()
init(balance: Double) {
_balance = balance
}
var balance: Double {
lock.withLock { _balance }
}
func deposit(amount: Double) async {
lock.withLock { _balance += amount }
}
func withdraw(amount: Double) async -> Bool {
lock.withLock {
guard _balance >= amount else { return false }
_balance -= amount
return true
}
}
}
```private var lock = Lock() // cannot find 'Lock' in scopeprotocol CachedProperty {
associatedtype Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}
@propertyWrapper
struct Cached<Value>: CachedProperty {
let wrappedValue: () -> Value
let condition: () -> Bool
var value: Value {
didSet {
if condition() {
wrappedValue = { self.value }
}
}
}
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.wrappedValue = wrappedValue
self.condition = condition
self.value = wrappedValue()
}
}```swift
protocol CachedProperty {
associatedtype Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}
// Property wrapper that caches the computed value of a property and recomputes it only when a specified condition changes.
@propertyWrapper
struct Cached<Value>: CachedProperty {
let wrappedValue: () -> Value
let condition: () -> Bool
var value: Value {
didSet {
if condition() {
wrappedValue = { self.value }
}
}
}
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.wrappedValue = wrappedValue
self.condition = condition
self.value = wrappedValue()
}
}
```wrappedValue = { self.value } // cannot assign to property: 'wrappedValue' is a 'let' constantvar cached: Int = { // property type 'Int' does not match 'wrappedValue' type '() -> Int'protocol CachedProperty {
associatedtype Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}
@propertyWrapper
struct Cached<Value>: CachedProperty {
var wrappedValue: () -> Value
var condition: () -> Bool
var value: Value?
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.wrappedValue = wrappedValue
self.condition = condition
}
var projectedValue: Cached<Value> {
self
}
var wrappedValue: Value {
if let value = value, condition() {
return value
} else {
let newValue = wrappedValue()
value = newValue
return newValue
}
}
}```swift
protocol CachedProperty {
associatedtype Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}
// Property wrapper that caches the computed value of a property and recomputes it only when a specified condition changes.
@propertyWrapper
struct Cached<Value>: CachedProperty {
var wrappedValue: () -> Value
var condition: () -> Bool
var value: Value?
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.wrappedValue = wrappedValue
self.condition = condition
}
var projectedValue: Cached<Value> {
self
}
var wrappedValue: Value {
if let value = value, condition() {
return value
} else {
let newValue = wrappedValue()
value = newValue
return newValue
}
}
}
```struct Cached<Value>: CachedProperty { // property wrapper type 'Cached' has multiple non-static properties named 'wrappedValue'var wrappedValue: Value { // invalid redeclaration of 'wrappedValue'value = newValue // cannot assign to property: 'self' is immutableprotocol CachedProperty {
associatedtype Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}
@propertyWrapper
struct Cached<Value>: CachedProperty {
let wrappedValue: () -> Value
let condition: () -> Bool
var value: Value {
didSet {
if condition() {
wrappedValue = { self.value }
}
}
}
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.wrappedValue = wrappedValue
self.condition = condition
self.value = wrappedValue()
}
}```swift
protocol CachedProperty {
associatedtype Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}
// Property wrapper that caches the computed value of a property and recomputes it only when a specified condition changes.
@propertyWrapper
struct Cached<Value>: CachedProperty {
let wrappedValue: () -> Value
let condition: () -> Bool
var value: Value {
didSet {
if condition() {
wrappedValue = { self.value }
}
}
}
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.wrappedValue = wrappedValue
self.condition = condition
self.value = wrappedValue()
}
}
```wrappedValue = { self.value } // cannot assign to property: 'wrappedValue' is a 'let' constantvar cached: Int = { // property type 'Int' does not match 'wrappedValue' type '() -> Int'protocol CachedProperty {
associatedtype Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}
@propertyWrapper
struct Cached<Value>: CachedProperty {
private var wrappedValue: () -> Value
private var condition: () -> Bool
private var value: Value?
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.wrappedValue = wrappedValue
self.condition = condition
}
var wrappedValue: Value {
if let value = value, condition() == false {
return value
}
value = wrappedValue()
return value!
}
}```swift
protocol CachedProperty {
associatedtype Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}
// Property wrapper that caches the computed value of a property and recomputes it only when a specified condition changes.
@propertyWrapper
struct Cached<Value>: CachedProperty {
private var wrappedValue: () -> Value
private var condition: () -> Bool
private var value: Value?
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.wrappedValue = wrappedValue
self.condition = condition
}
var wrappedValue: Value {
if let value = value, condition() == false {
return value
}
value = wrappedValue()
return value!
}
}
```struct Cached<Value>: CachedProperty { // property wrapper type 'Cached' has multiple non-static properties named 'wrappedValue'var wrappedValue: Value { // invalid redeclaration of 'wrappedValue'value = wrappedValue() // cannot assign to property: 'self' is immutableprotocol CachedProperty {
associatedtype Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}
@propertyWrapper
struct Cached<Value>: CachedProperty {
private var wrappedValue: () -> Value
private var condition: () -> Bool
private var value: Value?
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.wrappedValue = wrappedValue
self.condition = condition
}
var wrappedValue: Value {
if let value = value, condition() == false {
return value
}
value = wrappedValue()
return value!
}
}```swift
protocol CachedProperty {
associatedtype Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}
// Property wrapper that caches the computed value of a property and recomputes it only when a specified condition changes.
@propertyWrapper
struct Cached<Value>: CachedProperty {
private var wrappedValue: () -> Value
private var condition: () -> Bool
private var value: Value?
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.wrappedValue = wrappedValue
self.condition = condition
}
var wrappedValue: Value {
if let value = value, condition() == false {
return value
}
value = wrappedValue()
return value!
}
}
```struct Cached<Value>: CachedProperty { // property wrapper type 'Cached' has multiple non-static properties named 'wrappedValue'var wrappedValue: Value { // invalid redeclaration of 'wrappedValue'value = wrappedValue() // cannot assign to property: 'self' is immutableprotocol CachedProperty {
associatedtype Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}
@propertyWrapper
struct Cached<Value>: CachedProperty {
let wrappedValue: () -> Value
let condition: () -> Bool
var value: Value {
get { wrappedValue() }
set { wrappedValue = { newValue } }
}
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.wrappedValue = wrappedValue
self.condition = condition
}
}
struct MyStruct {
@Cached(wrappedValue: { 1 }, condition: { true }) var cachedProperty: Int
}```swift
protocol CachedProperty {
associatedtype Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}
// Property wrapper that caches the computed value of a property and recomputes it only when a specified condition changes.
@propertyWrapper
struct Cached<Value>: CachedProperty {
let wrappedValue: () -> Value
let condition: () -> Bool
var value: Value {
get { wrappedValue() }
set { wrappedValue = { newValue } }
}
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.wrappedValue = wrappedValue
self.condition = condition
}
}
// Usage example:
struct MyStruct {
@Cached(wrappedValue: { 1 }, condition: { true }) var cachedProperty: Int
}
let myStruct = MyStruct()
print(myStruct.cachedProperty) // Prints "1"
myStruct.cachedProperty = 2
print(myStruct.cachedProperty) // Prints "2"
```set { wrappedValue = { newValue } } // cannot assign to property: 'wrappedValue' is a 'let' constant@Cached(wrappedValue: { 1 }, condition: { true }) var cachedProperty: Int // property type 'Int' does not match 'wrappedValue' type '() -> () -> Int'var cached: Int = { // property type 'Int' does not match 'wrappedValue' type '() -> Int'protocol CachedProperty {
associatedtype Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}
@propertyWrapper
struct Cached<Value>: CachedProperty {
private var wrappedValue: () -> Value
private var condition: () -> Bool
private var cachedValue: Value?
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.wrappedValue = wrappedValue
self.condition = condition
}
var wrappedValue: Value {
if let cachedValue = cachedValue, condition() == false {
return cachedValue
}
cachedValue = wrappedValue()
return cachedValue!
}
}```swift
protocol CachedProperty {
associatedtype Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}
// Property wrapper that caches the computed value of a property and recomputes it only when a specified condition changes.
@propertyWrapper
struct Cached<Value>: CachedProperty {
private var wrappedValue: () -> Value
private var condition: () -> Bool
private var cachedValue: Value?
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.wrappedValue = wrappedValue
self.condition = condition
}
var wrappedValue: Value {
if let cachedValue = cachedValue, condition() == false {
return cachedValue
}
cachedValue = wrappedValue()
return cachedValue!
}
}
```struct Cached<Value>: CachedProperty { // property wrapper type 'Cached' has multiple non-static properties named 'wrappedValue'var wrappedValue: Value { // invalid redeclaration of 'wrappedValue'cachedValue = wrappedValue() // cannot assign to property: 'self' is immutableprotocol CachedProperty {
associatedtype Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}
@propertyWrapper
struct Cached<Value>: CachedProperty {
private var wrappedValue: () -> Value
private var condition: () -> Bool
private var value: Value?
var wrappedValue: Value {
get {
if let value = value, condition() {
return value
}
value = wrappedValue()
return value!
}
set {
value = newValue
}
}
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.wrappedValue = wrappedValue
self.condition = condition
}
}```swift
protocol CachedProperty {
associatedtype Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}
// Property wrapper that caches the computed value of a property and recomputes it only when a specified condition changes.
@propertyWrapper
struct Cached<Value>: CachedProperty {
private var wrappedValue: () -> Value
private var condition: () -> Bool
private var value: Value?
var wrappedValue: Value {
get {
if let value = value, condition() {
return value
}
value = wrappedValue()
return value!
}
set {
value = newValue
}
}
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.wrappedValue = wrappedValue
self.condition = condition
}
}
```struct Cached<Value>: CachedProperty { // property wrapper type 'Cached' has multiple non-static properties named 'wrappedValue'var wrappedValue: Value { // invalid redeclaration of 'wrappedValue'value = wrappedValue() // cannot assign to property: 'self' is immutableprotocol CachedProperty {
associatedtype Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}
@propertyWrapper
struct Cached<Value>: CachedProperty {
var wrappedValue: @autoclosure @escaping () -> Value
var condition: @escaping () -> Bool
var value: Value?
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.wrappedValue = wrappedValue
self.condition = condition
}
var projectedValue: Cached<Value> {
self
}
var wrappedValue: Value {
get {
if let value = value, condition() {
return value
}
value = wrappedValue()
return value!
}
set {
value = newValue
}
}
}
struct MyStruct {
@Cached(wrappedValue: { 1 }, condition: { true }) var cachedProperty: Int
}```swift
protocol CachedProperty {
associatedtype Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}
// Property wrapper that caches the computed value of a property and recomputes it only when a specified condition changes.
@propertyWrapper
struct Cached<Value>: CachedProperty {
var wrappedValue: @autoclosure @escaping () -> Value
var condition: @escaping () -> Bool
var value: Value?
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.wrappedValue = wrappedValue
self.condition = condition
}
var projectedValue: Cached<Value> {
self
}
var wrappedValue: Value {
get {
if let value = value, condition() {
return value
}
value = wrappedValue()
return value!
}
set {
value = newValue
}
}
}
// Example usage:
struct MyStruct {
@Cached(wrappedValue: { 1 }, condition: { true }) var cachedProperty: Int
}
let myStruct = MyStruct()
print(myStruct.cachedProperty) // Prints "1"
myStruct.cachedProperty = 2
print(myStruct.cachedProperty) // Prints "2"
```struct Cached<Value>: CachedProperty { // property wrapper type 'Cached' has multiple non-static properties named 'wrappedValue'var wrappedValue: @autoclosure @escaping () -> Value // '@autoclosure' may only be used on parametersvar condition: @escaping () -> Bool // @escaping attribute may only be used in function parameter positionself.wrappedValue = wrappedValue // function produces expected type 'Value'; did you mean to call it with '()'?value = wrappedValue() // cannot assign to property: 'self' is immutablevalue = wrappedValue() // cannot call value of non-function type 'Value'protocol CachedProperty {
associatedtype Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}
@propertyWrapper
struct Cached<Value>: CachedProperty {
let wrappedValue: @autoclosure @escaping () -> Value
let condition: @escaping () -> Bool
var projectedValue: Value {
get {
if condition() {
return wrappedValue()
} else {
return projectedValue
}
}
set {
wrappedValue = newValue
}
}
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.wrappedValue = wrappedValue
self.condition = condition
}
}```swift
protocol CachedProperty {
associatedtype Value
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}
// Property wrapper that caches the computed value of a property and recomputes it only when a specified condition changes.
@propertyWrapper
struct Cached<Value>: CachedProperty {
let wrappedValue: @autoclosure @escaping () -> Value
let condition: @escaping () -> Bool
var projectedValue: Value {
get {
if condition() {
return wrappedValue()
} else {
return projectedValue
}
}
set {
wrappedValue = newValue
}
}
init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool) {
self.wrappedValue = wrappedValue
self.condition = condition
}
}
```let wrappedValue: @autoclosure @escaping () -> Value // '@autoclosure' may only be used on parameterslet condition: @escaping () -> Bool // @escaping attribute may only be used in function parameter positionreturn projectedValue // attempting to access 'projectedValue' within its own gettervar cached: Int = { // property type 'Int' does not match 'wrappedValue' type '<<error type>>'infix operator >>>: FunctionCompositionPrecedence
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AssignmentPrecedence
}
func >>> <A, B, C>(lhs: @escaping (A) -> B, rhs: @escaping (B) -> C) -> (A) -> C {
return { x in
rhs(lhs(x))
}
}
infix operator >>>: FunctionCompositionPre```swift
infix operator >>>: FunctionCompositionPrecedence
// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AssignmentPrecedence
}
infix operator >>>: FunctionCompositionPrecedence
func >>> <A, B, C>(lhs: @escaping (A) -> B, rhs: @escaping (B) -> C) -> (A) -> C {
return { x in
rhs(lhs(x))
}
}
// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AssignmentPrecedence
}
infix operator >>>: FunctionCompositionPrecedence
func >>> <A, B, C>(lhs: @escaping (A) -> B, rhs: @escaping (B) -> C) -> (A) -> C {
return { x in
rhs(lhs(x))
}
}
// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AssignmentPrecedence
}
infix operator >>>: FunctionCompositionPrecedence
func >>> <A, B, C>(lhs: @escaping (A) -> B, rhs: @escaping (B) -> C) -> (A) -> C {
return { x in
rhs(lhs(x))
}
}
// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AssignmentPrecedence
}
infix operator >>>: FunctionCompositionPrecedence
func >>> <A, B, C>(lhs: @escaping (A) -> B, rhs: @escaping (B) -> C) -> (A) -> C {
return { x in
rhs(lhs(x))
}
}
// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AssignmentPrecedence
}
infix operator >>>: FunctionCompositionPrecedence
func >>> <A, B, C>(lhs: @escaping (A) -> B, rhs: @escaping (B) -> C) -> (A) -> C {
return { x in
rhs(lhs(x))
}
}
// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AssignmentPrecedence
}
infix operator >>>: FunctionCompositionPrecedence
func >>> <A, B, C>(lhs: @escaping (A) -> B, rhs: @escaping (B) -> C) -> (A) -> C {
return { x in
rhs(lhs(x))
}
}
// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AssignmentPrecedence
}
infix operator >>>: FunctionCompositionPrecedence
func >>> <A, B, C>(lhs: @escaping (A) -> B, rhs: @escaping (B) -> C) -> (A) -> C {
return { x in
rhs(lhs(x))
}
}
// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AssignmentPrecedence
}
infix operator >>>: FunctionCompositionPrefunc >>> <A, B, C>(lhs: @escaping (A) -> B, rhs: @escaping (B) -> C) -> (A) -> C { // ambiguous operator declarations found for operatorinfix operator >>>: FunctionCompositionPre // operator redeclaredinfix operator >>>: FunctionCompositionPre // unknown precedence group 'FunctionCompositionPre'let composedFunction = doubleDescription >>> stringCount // ambiguous operator declarations found for operatorinfix operator >>>: FunctionCompositionPrecedence
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AdditionPrecedence
}
func >>> <A, B, C>(f: @escaping (A) -> B, g: @escaping (B) -> C) -> (A) -> C {
return { x in g(f(x)) }
}
func >>> <A, B, C, D>(f: @escaping (A) -> B, g: @escaping (B) -> C, h: @escaping (C) -> D) -> (A) -> D {
return { x in h(g(f(x))) }
}
func >>> <A, B, C, D, E>(f: @escaping (A) -> B, g: @escaping (B) -> C, h: @escaping (C) -> D, i: @escaping (D) -> E) -> (A) -> E {
return { x in i(h(g(f(x)))) }
}
func >>> <A, B, C, D, E, F>(f: @escaping (A) -> B, g: @escaping (B) -> C, h: @escaping (C) -> D, i: @escaping (D) -> E, j: @escaping (E) -> F) -> (A) -> F {
return { x in j(i(h(g(f(x))))) }
}
func >>> <A, B, C, D, E, F, G>(f: @escaping (A) -> B, g: @escaping (B) -> C, h: @escaping (C) -> D, i: @escaping (D) -> E, j: @escaping (E) -> F, k: @escaping (F) -> G) -> (A) -> G {
return { x in k(j(i(h(g(f(x)))))) }
}
func >>> <A, B, C, D, E, F, G, H>(f: @escaping (A) -> B, g: @escaping (B) -> C, h: @escaping (C) -> D, i: @escaping (D) -> E, j: @escaping (E) -> F, k: @escaping (F) -> G, l: @escaping (G) -> H) -> (A) -> H {
return { x in l(k(j(i(h(g(f(x)))))) )}
}
func >>> <A, B, C, D, E, F, G, H, I>(f: @escaping (A) -> B, g: @escaping (B) -> C, h: @escaping (C) -> D, i: @escaping (D) -> E, j: @escaping (E) -> F, k: @escaping (F) -> G, l: @escaping (G) -> H, m: @escaping (H) -> I) -> (A) -> I {
return { x in m(l(k(j(i(h(g(f(x)))))) )) }
}
func >>> <A, B, C, D, E, F, G, H, I, J>(f: @escaping (A) -> B, g: @escaping (B) -> C, h: @escaping (C) -> D, i: @escaping (D) -> E, j: @escaping (E) -> F, k: @escaping (F) -> G, l: @escaping (G) -> H, m: @escaping (H) -> I, n: @escaping (I) -> J) -> (A) -> J {
return { x in n(m(l(k(j(i(h(g(f(x)))))) ))) }
}```swift
infix operator >>>: FunctionCompositionPrecedence
// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AdditionPrecedence
}
infix operator >>>: FunctionCompositionPrecedence
func >>> <A, B, C>(f: @escaping (A) -> B, g: @escaping (B) -> C) -> (A) -> C {
return { x in g(f(x)) }
}
func >>> <A, B, C, D>(f: @escaping (A) -> B, g: @escaping (B) -> C, h: @escaping (C) -> D) -> (A) -> D {
return { x in h(g(f(x))) }
}
func >>> <A, B, C, D, E>(f: @escaping (A) -> B, g: @escaping (B) -> C, h: @escaping (C) -> D, i: @escaping (D) -> E) -> (A) -> E {
return { x in i(h(g(f(x)))) }
}
func >>> <A, B, C, D, E, F>(f: @escaping (A) -> B, g: @escaping (B) -> C, h: @escaping (C) -> D, i: @escaping (D) -> E, j: @escaping (E) -> F) -> (A) -> F {
return { x in j(i(h(g(f(x))))) }
}
func >>> <A, B, C, D, E, F, G>(f: @escaping (A) -> B, g: @escaping (B) -> C, h: @escaping (C) -> D, i: @escaping (D) -> E, j: @escaping (E) -> F, k: @escaping (F) -> G) -> (A) -> G {
return { x in k(j(i(h(g(f(x)))))) }
}
func >>> <A, B, C, D, E, F, G, H>(f: @escaping (A) -> B, g: @escaping (B) -> C, h: @escaping (C) -> D, i: @escaping (D) -> E, j: @escaping (E) -> F, k: @escaping (F) -> G, l: @escaping (G) -> H) -> (A) -> H {
return { x in l(k(j(i(h(g(f(x)))))) )}
}
func >>> <A, B, C, D, E, F, G, H, I>(f: @escaping (A) -> B, g: @escaping (B) -> C, h: @escaping (C) -> D, i: @escaping (D) -> E, j: @escaping (E) -> F, k: @escaping (F) -> G, l: @escaping (G) -> H, m: @escaping (H) -> I) -> (A) -> I {
return { x in m(l(k(j(i(h(g(f(x)))))) )) }
}
func >>> <A, B, C, D, E, F, G, H, I, J>(f: @escaping (A) -> B, g: @escaping (B) -> C, h: @escaping (C) -> D, i: @escaping (D) -> E, j: @escaping (E) -> F, k: @escaping (F) -> G, l: @escaping (G) -> H, m: @escaping (H) -> I, n: @escaping (I) -> J) -> (A) -> J {
return { x in n(m(l(k(j(i(h(g(f(x)))))) ))) }
}
func >>> <A, B, C, D, E, F, G, H, I, J, K>(f: @escaping (A) -> B, g: @escaping (B) -> C, h: @escaping (C) -> D, i: @escaping (D) -> E, j: @escaping (E) -> F, k: @escaping (F) -> G, l:func >>> <A, B, C, D>(f: @escaping (A) -> B, g: @escaping (B) -> C, h: @escaping (C) -> D) -> (A) -> D { // operators must have one or two argumentsfunc >>> <A, B, C, D, E>(f: @escaping (A) -> B, g: @escaping (B) -> C, h: @escaping (C) -> D, i: @escaping (D) -> E) -> (A) -> E { // operators must have one or two argumentsfunc >>> <A, B, C, D, E, F>(f: @escaping (A) -> B, g: @escaping (B) -> C, h: @escaping (C) -> D, i: @escaping (D) -> E, j: @escaping (E) -> F) -> (A) -> F { // operators must have one or two argumentsfunc >>> <A, B, C, D, E, F, G>(f: @escaping (A) -> B, g: @escaping (B) -> C, h: @escaping (C) -> D, i: @escaping (D) -> E, j: @escaping (E) -> F, k: @escaping (F) -> G) -> (A) -> G { // operators must have one or two argumentsfunc >>> <A, B, C, D, E, F, G, H>(f: @escaping (A) -> B, g: @escaping (B) -> C, h: @escaping (C) -> D, i: @escaping (D) -> E, j: @escaping (E) -> F, k: @escaping (F) -> G, l: @escaping (G) -> H) -> (A) -> H { // operators must have one or two argumentsfunc >>> <A, B, C, D, E, F, G, H, I>(f: @escaping (A) -> B, g: @escaping (B) -> C, h: @escaping (C) -> D, i: @escaping (D) -> E, j: @escaping (E) -> F, k: @escaping (F) -> G, l: @escaping (G) -> H, m: @escaping (H) -> I) -> (A) -> I { // operators must have one or two argumentsfunc >>> <A, B, C, D, E, F, G, H, I, J>(f: @escaping (A) -> B, g: @escaping (B) -> C, h: @escaping (C) -> D, i: @escaping (D) -> E, j: @escaping (E) -> F, k: @escaping (F) -> G, l: @escaping (G) -> H, m: @escaping (H) -> I, n: @escaping (I) -> J) -> (A) -> J { // operators must have one or two argumentsinfix operator >>>: FunctionCompositionPrecedence
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AssignmentPrecedence
}
func >>> <A, B, C>(lhs: @escaping (A) -> B, rhs: @escaping (B) -> C) -> (A) -> C {
return { x in
rhs(lhs(x))
}
}```swift
infix operator >>>: FunctionCompositionPrecedence
// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AssignmentPrecedence
}
func >>> <A, B, C>(lhs: @escaping (A) -> B, rhs: @escaping (B) -> C) -> (A) -> C {
return { x in
rhs(lhs(x))
}
}
```infix operator >>>: FunctionCompositionPrecedence
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AssignmentPrecedence
}
func >>> <A, B, C>(lhs: @escaping (A) -> B, rhs: @escaping (B) -> C) -> (A) -> C {
return { rhs(lhs($0)) }
}```swift
infix operator >>>: FunctionCompositionPrecedence
// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AssignmentPrecedence
}
infix operator >>>: FunctionCompositionPrecedence
func >>> <A, B, C>(lhs: @escaping (A) -> B, rhs: @escaping (B) -> C) -> (A) -> C {
return { rhs(lhs($0)) }
}
// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AssignmentPrecedence
}
infix operator >>>: FunctionCompositionPrecedence
func >>> <A, B, C>(lhs: @escaping (A) -> B, rhs: @escaping (B) -> C) -> (A) -> C {
return { rhs(lhs($0)) }
}
// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AssignmentPrecedence
}
infix operator >>>: FunctionCompositionPrecedence
func >>> <A, B, C>(lhs: @escaping (A) -> B, rhs: @escaping (B) -> C) -> (A) -> C {
return { rhs(lhs($0)) }
}
// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AssignmentPrecedence
}
infix operator >>>: FunctionCompositionPrecedence
func >>> <A, B, C>(lhs: @escaping (A) -> B, rhs: @escaping (B) -> C) -> (A) -> C {
return { rhs(lhs($0)) }
}
// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AssignmentPrecedence
}
infix operator >>>: FunctionCompositionPrecedence
func >>> <A, B, C>(lhs: @escaping (A) -> B, rhs: @escaping (B) -> C) -> (A) -> C {
return { rhs(lhs($0)) }
}
// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AssignmentPrecedence
}
infix operator >>>: FunctionCompositionPrecedence
func >>> <A, B, C>(lhs: @escaping (A) -> B, rhs: @escaping (B) -> C) -> (A) -> C {
return { rhs(lhs($0)) }
}
// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AssignmentPrecedence
}
infix operator >>>: FunctionCompositionPrecedence
func >>> <A, B, C>(lhs: @escaping (A) -> B, rhs: @escaping (B) -> C) -> (A) -> C {
return { rhs(lhs($0)) }
}
// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AssignmentPrecedence
}
infix operator >>>: FunctionCompositionPrecedence
func >>> <A, B, C>(lhs: @escaping (A)infix operator >>>: FunctionCompositionPrecedence
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AdditionPrecedence
}
func >>> <A, B, C>(lhs: @escaping (A) -> B, rhs: @escaping (B) -> C) -> (A) -> C {
return { x in rhs(lhs(x)) }
}```swift
infix operator >>>: FunctionCompositionPrecedence
// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AdditionPrecedence
}
func >>> <A, B, C>(lhs: @escaping (A) -> B, rhs: @escaping (B) -> C) -> (A) -> C {
return { x in rhs(lhs(x)) }
}
// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AdditionPrecedence
}
func >>> <A, B, C>(lhs: @escaping (A) -> B, rhs: @escaping (B) -> C) -> (A) -> C {
return { x in rhs(lhs(x)) }
}
// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AdditionPrecedence
}
func >>> <A, B, C>(lhs: @escaping (A) -> B, rhs: @escaping (B) -> C) -> (A) -> C {
return { x in rhs(lhs(x)) }
}
// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AdditionPrecedence
}
func >>> <A, B, C>(lhs: @escaping (A) -> B, rhs: @escaping (B) -> C) -> (A) -> C {
return { x in rhs(lhs(x)) }
}
// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AdditionPrecedence
}
func >>> <A, B, C>(lhs: @escaping (A) -> B, rhs: @escaping (B) -> C) -> (A) -> C {
return { x in rhs(lhs(x)) }
}
// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AdditionPrecedence
}
func >>> <A, B, C>(lhs: @escaping (A) -> B, rhs: @escaping (B) -> C) -> (A) -> C {
return { x in rhs(lhs(x)) }
}
// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AdditionPrecedence
}
func >>> <A, B, C>(lhs: @escaping (A) -> B, rhs: @escaping (B) -> C) -> (A) -> C {
return { x in rhs(lhs(x)) }
}
// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AdditionPrecedence
}
func >>> <A, B, C>(lhs: @escaping (A) -> B, rhs: @escaping (B) -> C) -> (A) -> C {
return { x in rhs(lhs(x)) }
}
// Custom infix operator >>> that composes two functions. The operator should take two functions andinfix operator >>>: FunctionCompositionPrecedence
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AdditionPrecedence
}
func >>> <A, B, C>(f: @escaping (A) -> B, g: @escaping (B) -> C) -> (A) -> C {
return { x in g(f(x)) }
}```swift
infix operator >>>: FunctionCompositionPrecedence
// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AdditionPrecedence
}
func >>> <A, B, C>(f: @escaping (A) -> B, g: @escaping (B) -> C) -> (A) -> C {
return { x in g(f(x)) }
}
```infix operator >>>: FunctionCompositionPrecedence
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AdditionPrecedence
}
func >>> <A, B, C>(f: @escaping (A) -> B, g: @escaping (B) -> C) -> (A) -> C {
return { x in g(f(x)) }
}```swift
infix operator >>>: FunctionCompositionPrecedence
// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AdditionPrecedence
}
func >>> <A, B, C>(f: @escaping (A) -> B, g: @escaping (B) -> C) -> (A) -> C {
return { x in g(f(x)) }
}
```infix operator >>>: FunctionCompositionPrecedence
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AdditionPrecedence
}
func >>> <A, B, C>(lhs: @escaping (A) -> B, rhs: @escaping (B) -> C) -> (A) -> C {
return { x in
rhs(lhs(x))
}
}```swift
infix operator >>>: FunctionCompositionPrecedence
// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AdditionPrecedence
}
func >>> <A, B, C>(lhs: @escaping (A) -> B, rhs: @escaping (B) -> C) -> (A) -> C {
return { x in
rhs(lhs(x))
}
}
// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AdditionPrecedence
}
func >>> <A, B, C>(lhs: @escaping (A) -> B, rhs: @escaping (B) -> C) -> (A) -> C {
return { x in
rhs(lhs(x))
}
}
```infix operator >>>: FunctionCompositionPrecedence
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AdditionPrecedence
}
func >>> <A, B, C>(lhs: @escaping (A) -> B, rhs: @escaping (B) -> C) -> (A) -> C {
return { rhs(lhs($0)) }
}```swift
infix operator >>>: FunctionCompositionPrecedence
// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AdditionPrecedence
}
func >>> <A, B, C>(lhs: @escaping (A) -> B, rhs: @escaping (B) -> C) -> (A) -> C {
return { rhs(lhs($0)) }
}
// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AdditionPrecedence
}
func >>> <A, B, C>(lhs: @escaping (A) -> B, rhs: @escaping (B) -> C) -> (A) -> C {
return { rhs(lhs($0)) }
}
// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AdditionPrecedence
}
func >>> <A, B, C>(lhs: @escaping (A) -> B, rhs: @escaping (B) -> C) -> (A) -> C {
return { rhs(lhs($0)) }
}
// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AdditionPrecedence
}
func >>> <A, B, C>(lhs: @escaping (A) -> B, rhs: @escaping (B) -> C) -> (A) -> C {
return { rhs(lhs($0)) }
}
// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AdditionPrecedence
}
func >>> <A, B, C>(lhs: @escaping (A) -> B, rhs: @escaping (B) -> C) -> (A) -> C {
return { rhs(lhs($0)) }
}
// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AdditionPrecedence
}
func >>> <A, B, C>(lhs: @escaping (A) -> B, rhs: @escaping (B) -> C) -> (A) -> C {
return { rhs(lhs($0)) }
}
// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AdditionPrecedence
}
func >>> <A, B, C>(lhs: @escaping (A) -> B, rhs: @escaping (B) -> C) -> (A) -> C {
return { rhs(lhs($0)) }
}
// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AdditionPrecedence
}
func >>> <A, B, C>(lhs: @escaping (A) -> B, rhs: @escaping (B) -> C) -> (A) -> C {
return { rhs(lhs($0)) }
}
// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.einfix operator >>>: FunctionCompositionPrecedence
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AssignmentPrecedence
}
func >>> <A, B, C>(lhs: @escaping (A) -> B, rhs: @escaping (B) -> C) -> (A) -> C {
return { rhs(lhs($0)) }
}```swift
infix operator >>>: FunctionCompositionPrecedence
// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
precedencegroup FunctionCompositionPrecedence {
associativity: left
higherThan: AssignmentPrecedence
}
func >>> <A, B, C>(lhs: @escaping (A) -> B, rhs: @escaping (B) -> C) -> (A) -> C {
return { rhs(lhs($0)) }
}
```import CryptoKit
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: bufferSize)
let context = SHA256.hash(using:.init())
var bytesRead = 0
while inputStream.hasBytesAvailable {
bytesRead = inputStream.read(buffer, maxLength: bufferSize)
context.update(data:.init(buffer: buffer, count: bytesRead))
}
return context.finalize()
}
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: bufferSize)
let context = SHA256_CTX()
SHA256_Init(&context)
var bytesRead = 0
while inputStream.hasBytesAvailable {
bytesRead = inputStream.read(buffer, maxLength: bufferSize)
SHA256_Update(&context, buffer, bytesRead)
}
var digest = SHA256Digest()
SHA256_Final(&digest, &context)
return digest
}```swift
import CryptoKit
// Function that computes the SHA-256 hash of data read from a stream with a specified buffer size using Apple's CryptoKit framework.
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: bufferSize)
let context = SHA256.hash(using:.init())
var bytesRead = 0
while inputStream.hasBytesAvailable {
bytesRead = inputStream.read(buffer, maxLength: bufferSize)
context.update(data:.init(buffer: buffer, count: bytesRead))
}
return context.finalize()
}
// Function that computes the SHA-256 hash of data read from a stream with a specified buffer size using OpenSSL.
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: bufferSize)
let context = SHA256_CTX()
SHA256_Init(&context)
var bytesRead = 0
while inputStream.hasBytesAvailable {
bytesRead = inputStream.read(buffer, maxLength: bufferSize)
SHA256_Update(&context, buffer, bytesRead)
}
var digest = SHA256Digest()
SHA256_Final(&digest, &context)
return digest
}
```let context = SHA256.hash(using:.init()) // incorrect argument label in call (have 'using:', expected 'data:')let context = SHA256.hash(using:.init()) // 'DataProtocol' cannot be constructed because it has no accessible initializerscontext.update(data:.init(buffer: buffer, count: bytesRead)) // cannot infer contextual base in reference to member 'init'func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest { // invalid redeclaration of 'computeSHA256Hash(of:bufferSize:)'let context = SHA256_CTX() // cannot find 'SHA256_CTX' in scopeSHA256_Init(&context) // cannot find 'SHA256_Init' in scopeSHA256_Update(&context, buffer, bytesRead) // cannot find 'SHA256_Update' in scopevar digest = SHA256Digest() // 'SHA256Digest' cannot be constructed because it has no accessible initializersSHA256_Final(&digest, &context) // cannot find 'SHA256_Final' in scopeimport CryptoKit
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: bufferSize)
let context = SHA256.hash(using:.init())
var bytesRead = 0
var totalBytesRead = 0
while inputStream.hasBytesAvailable {
bytesRead = inputStream.read(buffer, maxLength: bufferSize)
guard bytesRead > 0 else {
break
}
context.update(data:.init(buffer: buffer, count: bytesRead))
totalBytesRead += bytesRead
}
return context.finalize()
}```swift
import CryptoKit
// Function that computes the SHA-256 hash of data read from a stream with a specified buffer size using Apple's CryptoKit framework.
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: bufferSize)
let context = SHA256.hash(using:.init())
var bytesRead = 0
var totalBytesRead = 0
while inputStream.hasBytesAvailable {
bytesRead = inputStream.read(buffer, maxLength: bufferSize)
guard bytesRead > 0 else {
break
}
context.update(data:.init(buffer: buffer, count: bytesRead))
totalBytesRead += bytesRead
}
return context.finalize()
}
```let context = SHA256.hash(using:.init()) // 'DataProtocol' cannot be constructed because it has no accessible initializerslet context = SHA256.hash(using:.init()) // incorrect argument label in call (have 'using:', expected 'data:')context.update(data:.init(buffer: buffer, count: bytesRead)) // cannot infer contextual base in reference to member 'init'import CryptoKit
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: bufferSize)
defer {
buffer.deallocate()
}
let context = SHA256.init()
var digest = SHA256Digest()
while inputStream.hasBytesAvailable {
let bytesRead = inputStream.read(buffer, maxLength: bufferSize)
if bytesRead < 0 {
// Error reading from the stream.
break
}
context.update(data: Data(bytes: buffer, count: bytesRead))
}
context.finalize(&digest)
return digest
}
func computeSHA256Hash(of string: String) -> SHA256Digest {
let context = SHA256.init()
let data = string.data(using:.utf8)!
context.update(data: data)
var digest = SHA256Digest()
context.finalize(&digest)
return digest
}
func computeSHA256Hash(of fileURL: URL) -> SHA256Digest? {
guard let inputStream = InputStream(url: fileURL) else {
return nil
}
let bufferSize = 4096
let digest = computeSHA256Hash(of: inputStream, bufferSize: bufferSize)
return digest
}```swift
import CryptoKit
// Function that computes the SHA-256 hash of data read from a stream with a specified buffer size using Apple's CryptoKit framework.
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: bufferSize)
defer {
buffer.deallocate()
}
let context = SHA256.init()
var digest = SHA256Digest()
while inputStream.hasBytesAvailable {
let bytesRead = inputStream.read(buffer, maxLength: bufferSize)
if bytesRead < 0 {
// Error reading from the stream.
break
}
context.update(data: Data(bytes: buffer, count: bytesRead))
}
context.finalize(&digest)
return digest
}
// Function that computes the SHA-256 hash of a given string using Apple's CryptoKit framework.
func computeSHA256Hash(of string: String) -> SHA256Digest {
let context = SHA256.init()
let data = string.data(using:.utf8)!
context.update(data: data)
var digest = SHA256Digest()
context.finalize(&digest)
return digest
}
// Function that computes the SHA-256 hash of a given file using Apple's CryptoKit framework.
func computeSHA256Hash(of fileURL: URL) -> SHA256Digest? {
guard let inputStream = InputStream(url: fileURL) else {
return nil
}
let bufferSize = 4096
let digest = computeSHA256Hash(of: inputStream, bufferSize: bufferSize)
return digest
}
```var digest = SHA256Digest() // 'SHA256Digest' cannot be constructed because it has no accessible initializerscontext.update(data: Data(bytes: buffer, count: bytesRead)) // cannot use mutating member on immutable value: 'context' is a 'let' constantcontext.finalize(&digest) // argument passed to call that takes no argumentscontext.update(data: data) // cannot use mutating member on immutable value: 'context' is a 'let' constantvar digest = SHA256Digest() // 'SHA256Digest' cannot be constructed because it has no accessible initializerscontext.finalize(&digest) // argument passed to call that takes no argumentsimport CryptoKit
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
let digest = SHA256.hash(data: inputStream.readData(ofLength: bufferSize))
return digest
}```swift
import CryptoKit
// Function that computes the SHA-256 hash of data read from a stream with a specified buffer size using Apple's CryptoKit framework.
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
let digest = SHA256.hash(data: inputStream.readData(ofLength: bufferSize))
return digest
}
```let digest = SHA256.hash(data: inputStream.readData(ofLength: bufferSize)) // value of type 'InputStream' has no member 'readData'import CryptoKit
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
let digest = SHA256.hash(data: inputStream.readData(ofLength: bufferSize))
return digest
}```swift
import CryptoKit
// Function that computes the SHA-256 hash of data read from a stream with a specified buffer size using Apple's CryptoKit framework.
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
let digest = SHA256.hash(data: inputStream.readData(ofLength: bufferSize))
return digest
}
```let digest = SHA256.hash(data: inputStream.readData(ofLength: bufferSize)) // value of type 'InputStream' has no member 'readData'import CryptoKit
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
let digest = SHA256.hash(data: inputStream.readData(ofLength: bufferSize))
return digest
}```swift
import CryptoKit
// Function that computes the SHA-256 hash of data read from a stream with a specified buffer size using Apple's CryptoKit framework.
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
let digest = SHA256.hash(data: inputStream.readData(ofLength: bufferSize))
return digest
}
```let digest = SHA256.hash(data: inputStream.readData(ofLength: bufferSize)) // value of type 'InputStream' has no member 'readData'import CryptoKit
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest? {
let digest = SHA256.hash(data: inputStream.read(bufferSize))
return digest
}```swift
import CryptoKit
// Function that computes the SHA-256 hash of data read from a stream with a specified buffer size using Apple's CryptoKit framework.
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest? {
let digest = SHA256.hash(data: inputStream.read(bufferSize))
return digest
}
```let digest = SHA256.hash(data: inputStream.read(bufferSize)) // static method 'hash(data:)' requires that 'Int' conform to 'DataProtocol'let digest = SHA256.hash(data: inputStream.read(bufferSize)) // missing argument for parameter #1 in callimport CryptoKit
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
let digest = SHA256.hash(data: inputStream.read(bufferSize))
return digest
}```swift
import CryptoKit
// Function that computes the SHA-256 hash of data read from a stream with a specified buffer size using Apple's CryptoKit framework.
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
let digest = SHA256.hash(data: inputStream.read(bufferSize))
return digest
}
```let digest = SHA256.hash(data: inputStream.read(bufferSize)) // static method 'hash(data:)' requires that 'Int' conform to 'DataProtocol'let digest = SHA256.hash(data: inputStream.read(bufferSize)) // missing argument for parameter #1 in callimport CryptoKit
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
let digest = SHA256.hash(data: inputStream.readData(ofLength: bufferSize))
return digest
}```swift
import CryptoKit
// Function that computes the SHA-256 hash of data read from a stream with a specified buffer size using Apple's CryptoKit framework.
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest {
let digest = SHA256.hash(data: inputStream.readData(ofLength: bufferSize))
return digest
}
```let digest = SHA256.hash(data: inputStream.readData(ofLength: bufferSize)) // value of type 'InputStream' has no member 'readData'import CryptoKit
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest? {
let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: bufferSize)
defer {
buffer.deallocate()
}
var hasher = SHA256()
var bytesRead = 0
var totalBytesRead = 0
while inputStream.hasBytesAvailable {
bytesRead = inputStream.read(buffer, maxLength: bufferSize)
guard bytesRead > 0 else {
return nil
}
hasher.update(data: Data(bytes: buffer, count: bytesRead))
totalBytesRead += bytesRead
}
return hasher.finalize()
}```swift
import CryptoKit
// Function that computes the SHA-256 hash of data read from a stream with a specified buffer size using Apple's CryptoKit framework.
func computeSHA256Hash(of inputStream: InputStream, bufferSize: Int) -> SHA256Digest? {
let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: bufferSize)
defer {
buffer.deallocate()
}
var hasher = SHA256()
var bytesRead = 0
var totalBytesRead = 0
while inputStream.hasBytesAvailable {
bytesRead = inputStream.read(buffer, maxLength: bufferSize)
guard bytesRead > 0 else {
return nil
}
hasher.update(data: Data(bytes: buffer, count: bytesRead))
totalBytesRead += bytesRead
}
return hasher.finalize()
}
```typealias Tuple16 = (Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)
extension String {
init(tuple16: Tuple16) {
self.init(cString: tuple16)
}
}```swift
typealias Tuple16 = (Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
self.init(cString: tuple16)
}
}
```self.init(cString: tuple16) // no exact matches in call to initializertypealias Tuple16 = (Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)
extension String {
init(tuple16: Tuple16) {
self = String(cString: tuple16)
}
}```swift
typealias Tuple16 = (Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
self = String(cString: tuple16)
}
}
```self = String(cString: tuple16) // no exact matches in call to initializertypealias Tuple16 = (Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)
extension String {
init(tuple16: Tuple16) {
self.init(cString: tuple16)
}
}```swift
typealias Tuple16 = (Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
self.init(cString: tuple16)
}
}
```self.init(cString: tuple16) // no exact matches in call to initializertypealias Tuple16 = (Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)
extension String {
init(tuple16: Tuple16) {
var index = 0
var buffer = [Int8]()
while index < tuple16.count {
let byte = tuple16[index]
if byte == 0 {
break
}
buffer.append(byte)
index += 1
}
self = String(cString: buffer)
}
}```swift
typealias Tuple16 = (Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
var index = 0
var buffer = [Int8]()
while index < tuple16.count {
let byte = tuple16[index]
if byte == 0 {
break
}
buffer.append(byte)
index += 1
}
self = String(cString: buffer)
}
}
```while index < tuple16.count { // value of tuple type 'Tuple16' (aka '(Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)') has no member 'count'let byte = tuple16[index] // cannot access element using subscript for tuple type 'Tuple16' (aka '(Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)'); use '.' notation insteadtypealias Tuple16 = (Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)
extension String {
init(tuple16: Tuple16) {
self.init(cString: tuple16)
}
}```swift
typealias Tuple16 = (Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
self.init(cString: tuple16)
}
}
let tuple16: Tuple16 = (1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
let string = String(tuple16: tuple16)
```self.init(cString: tuple16) // no exact matches in call to initializertypealias Tuple16 = (Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)
extension String {
init(tuple16: Tuple16) {
self = String(cString: tuple16)
}
}```swift
typealias Tuple16 = (Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
self = String(cString: tuple16)
}
}
let tuple16: Tuple16 = (0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x00)
let string = String(tuple16: tuple16)
```self = String(cString: tuple16) // no exact matches in call to initializertypealias Tuple16 = (Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)
extension String {
init(tuple16: Tuple16) {
self.init(cString: tuple16)
}
}```swift
typealias Tuple16 = (Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
self.init(cString: tuple16)
}
}
let tuple16: Tuple16 = (0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 0x00)
let string = String(tuple16: tuple16)
print(string) // Prints "abcdefghijklmno"
```self.init(cString: tuple16) // no exact matches in call to initializertypealias Tuple16 = (Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)
extension String {
init(tuple16: Tuple16) {
self.init(cString: tuple16)
}
}```swift
typealias Tuple16 = (Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
self.init(cString: tuple16)
}
}
```self.init(cString: tuple16) // no exact matches in call to initializertypealias Tuple16 = (Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)
extension String {
init(tuple16: Tuple16) {
self.init(cString: tuple16)
}
}```swift
typealias Tuple16 = (Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
self.init(cString: tuple16)
}
}
```self.init(cString: tuple16) // no exact matches in call to initializertypealias Tuple16 = (Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)
extension String {
init(tuple16: Tuple16) {
self.init(cString: tuple16)
}
}```swift
typealias Tuple16 = (Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8)
// Extension to the String type that allows initializing a String from a tuple of 16 Int8 values, where the tuple represents a C-style null-terminated string.
extension String {
init(tuple16: Tuple16) {
self.init(cString: tuple16)
}
}
```self.init(cString: tuple16) // no exact matches in call to initializerimport CoreVideo
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
var lhsSize = CVPixelBufferGetWidth(lhs) * CVPixelBufferGetHeight(lhs)
var rhsSize = CVPixelBufferGetWidth(rhs) * CVPixelBufferGetHeight(rhs)
if lhsSize!= rhsSize {
return false
}
var lhsPixelFormat = CVPixelBufferGetPixelFormatType(lhs)
var rhsPixelFormat = CVPixelBufferGetPixelFormatType(rhs)
if lhsPixelFormat!= rhsPixelFormat {
return false
}
var lhsBaseAddress = CVPixelBufferGetBaseAddress(lhs)
var rhsBaseAddress = CVPixelBufferGetBaseAddress(rhs)
if lhsBaseAddress!= rhsBaseAddress {
return false
}
return true
}```swift
import CoreVideo
// Custom operator which provides comparison for two CVPixelBuffer objects and returns true if two pixel buffers equal in size, pixel format, and content.
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
var lhsSize = CVPixelBufferGetWidth(lhs) * CVPixelBufferGetHeight(lhs)
var rhsSize = CVPixelBufferGetWidth(rhs) * CVPixelBufferGetHeight(rhs)
if lhsSize!= rhsSize {
return false
}
var lhsPixelFormat = CVPixelBufferGetPixelFormatType(lhs)
var rhsPixelFormat = CVPixelBufferGetPixelFormatType(rhs)
if lhsPixelFormat!= rhsPixelFormat {
return false
}
var lhsBaseAddress = CVPixelBufferGetBaseAddress(lhs)
var rhsBaseAddress = CVPixelBufferGetBaseAddress(rhs)
if lhsBaseAddress!= rhsBaseAddress {
return false
}
return true
}
```if lhsSize!= rhsSize { // use of '=' in a boolean context, did you mean '=='?if lhsSize!= rhsSize { // cannot force unwrap value of non-optional type 'Int'if lhsSize!= rhsSize { // '=' must have consistent whitespace on both sidesif lhsPixelFormat!= rhsPixelFormat { // cannot force unwrap value of non-optional type 'OSType' (aka 'UInt32')if lhsPixelFormat!= rhsPixelFormat { // use of '=' in a boolean context, did you mean '=='?if lhsPixelFormat!= rhsPixelFormat { // '=' must have consistent whitespace on both sidesif lhsBaseAddress!= rhsBaseAddress { // '=' must have consistent whitespace on both sidesif lhsBaseAddress!= rhsBaseAddress { // use of '=' in a boolean context, did you mean '=='?if lhsBaseAddress!= rhsBaseAddress { // value of optional type 'UnsafeMutableRawPointer?' must be unwrapped to a value of type 'UnsafeMutableRawPointer'import CoreVideo
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
let width = CVPixelBufferGetWidth(lhs)
let height = CVPixelBufferGetHeight(lhs)
let pixelFormat = CVPixelBufferGetPixelFormatType(lhs)
let bytesPerRow = CVPixelBufferGetBytesPerRow(lhs)
let baseAddress = CVPixelBufferGetBaseAddress(lhs)
let flags = CVPixelBufferGetFlags(lhs)
return width == CVPixelBufferGetWidth(rhs) &&
height == CVPixelBufferGetHeight(rhs) &&
pixelFormat == CVPixelBufferGetPixelFormatType(rhs) &&
bytesPerRow == CVPixelBufferGetBytesPerRow(rhs) &&
baseAddress == CVPixelBufferGetBaseAddress(rhs) &&
flags == CVPixelBufferGetFlags(rhs)
}```swift
import CoreVideo
// Custom operator which provides comparison for two CVPixelBuffer objects and returns true if two pixel buffers equal in size, pixel format, and content.
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
let width = CVPixelBufferGetWidth(lhs)
let height = CVPixelBufferGetHeight(lhs)
let pixelFormat = CVPixelBufferGetPixelFormatType(lhs)
let bytesPerRow = CVPixelBufferGetBytesPerRow(lhs)
let baseAddress = CVPixelBufferGetBaseAddress(lhs)
let flags = CVPixelBufferGetFlags(lhs)
return width == CVPixelBufferGetWidth(rhs) &&
height == CVPixelBufferGetHeight(rhs) &&
pixelFormat == CVPixelBufferGetPixelFormatType(rhs) &&
bytesPerRow == CVPixelBufferGetBytesPerRow(rhs) &&
baseAddress == CVPixelBufferGetBaseAddress(rhs) &&
flags == CVPixelBufferGetFlags(rhs)
}
```let flags = CVPixelBufferGetFlags(lhs) // cannot find 'CVPixelBufferGetFlags' in scopeflags == CVPixelBufferGetFlags(rhs) // cannot find 'CVPixelBufferGetFlags' in scopeimport CoreVideo
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
var width = 0
var height = 0
var pixelFormat = 0
var result = false
let status = CVPixelBufferGetWidth(lhs, &width)
if status == kCVReturnSuccess {
let status = CVPixelBufferGetHeight(lhs, &height)
if status == kCVReturnSuccess {
let status = CVPixelBufferGetPixelFormatType(lhs, &pixelFormat)
if status == kCVReturnSuccess {
result = width == CVPixelBufferGetWidth(rhs) &&
height == CVPixelBufferGetHeight(rhs) &&
pixelFormat == CVPixelBufferGetPixelFormatType(rhs)
}
}
}
return result
}```swift
import CoreVideo
// Custom operator which provides comparison for two CVPixelBuffer objects and returns true if two pixel buffers equal in size, pixel format, and content.
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
var width = 0
var height = 0
var pixelFormat = 0
var result = false
let status = CVPixelBufferGetWidth(lhs, &width)
if status == kCVReturnSuccess {
let status = CVPixelBufferGetHeight(lhs, &height)
if status == kCVReturnSuccess {
let status = CVPixelBufferGetPixelFormatType(lhs, &pixelFormat)
if status == kCVReturnSuccess {
result = width == CVPixelBufferGetWidth(rhs) &&
height == CVPixelBufferGetHeight(rhs) &&
pixelFormat == CVPixelBufferGetPixelFormatType(rhs)
}
}
}
return result
}
```let status = CVPixelBufferGetWidth(lhs, &width) // extra argument in calllet status = CVPixelBufferGetHeight(lhs, &height) // extra argument in calllet status = CVPixelBufferGetPixelFormatType(lhs, &pixelFormat) // extra argument in callimport CoreVideo
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
var lhsAttributes = CVPixelBufferGetPixelFormatType(lhs)
var rhsAttributes = CVPixelBufferGetPixelFormatType(rhs)
if lhsAttributes!= rhsAttributes {
return false
}
let width = CVPixelBufferGetWidth(lhs)
let height = CVPixelBufferGetHeight(lhs)
if width!= CVPixelBufferGetWidth(rhs) || height!= CVPixelBufferGetHeight(rhs) {
return false
}
let bytesPerRow = CVPixelBufferGetBytesPerRow(lhs)
let bytesPerRow2 = CVPixelBufferGetBytesPerRow(rhs)
if bytesPerRow!= bytesPerRow2 {
return false
}
let baseAddress = CVPixelBufferGetBaseAddress(lhs)
let baseAddress2 = CVPixelBufferGetBaseAddress(rhs)
if baseAddress!= baseAddress2 {
return false
}
return true
}```swift
import CoreVideo
// Custom operator which provides comparison for two CVPixelBuffer objects and returns true if two pixel buffers equal in size, pixel format, and content.
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
var lhsAttributes = CVPixelBufferGetPixelFormatType(lhs)
var rhsAttributes = CVPixelBufferGetPixelFormatType(rhs)
if lhsAttributes!= rhsAttributes {
return false
}
let width = CVPixelBufferGetWidth(lhs)
let height = CVPixelBufferGetHeight(lhs)
if width!= CVPixelBufferGetWidth(rhs) || height!= CVPixelBufferGetHeight(rhs) {
return false
}
let bytesPerRow = CVPixelBufferGetBytesPerRow(lhs)
let bytesPerRow2 = CVPixelBufferGetBytesPerRow(rhs)
if bytesPerRow!= bytesPerRow2 {
return false
}
let baseAddress = CVPixelBufferGetBaseAddress(lhs)
let baseAddress2 = CVPixelBufferGetBaseAddress(rhs)
if baseAddress!= baseAddress2 {
return false
}
return true
}
```if lhsAttributes!= rhsAttributes { // '=' must have consistent whitespace on both sidesif lhsAttributes!= rhsAttributes { // use of '=' in a boolean context, did you mean '=='?if lhsAttributes!= rhsAttributes { // cannot force unwrap value of non-optional type 'OSType' (aka 'UInt32')if width!= CVPixelBufferGetWidth(rhs) || height!= CVPixelBufferGetHeight(rhs) { // '=' must have consistent whitespace on both sidesif width!= CVPixelBufferGetWidth(rhs) || height!= CVPixelBufferGetHeight(rhs) { // cannot force unwrap value of non-optional type 'Int'if width!= CVPixelBufferGetWidth(rhs) || height!= CVPixelBufferGetHeight(rhs) { // cannot force unwrap value of non-optional type 'Int'if width!= CVPixelBufferGetWidth(rhs) || height!= CVPixelBufferGetHeight(rhs) { // type 'Int' cannot be used as a boolean; test for '!= 0' insteadif width!= CVPixelBufferGetWidth(rhs) || height!= CVPixelBufferGetHeight(rhs) { // '=' must have consistent whitespace on both sidesif width!= CVPixelBufferGetWidth(rhs) || height!= CVPixelBufferGetHeight(rhs) { // use of '=' in a boolean context, did you mean '=='?if width!= CVPixelBufferGetWidth(rhs) || height!= CVPixelBufferGetHeight(rhs) { // cannot assign value of type '()' to type 'Int'if width!= CVPixelBufferGetWidth(rhs) || height!= CVPixelBufferGetHeight(rhs) { // type 'Int' cannot be used as a boolean; test for '!= 0' insteadif bytesPerRow!= bytesPerRow2 { // cannot force unwrap value of non-optional type 'Int'if bytesPerRow!= bytesPerRow2 { // '=' must have consistent whitespace on both sidesif bytesPerRow!= bytesPerRow2 { // use of '=' in a boolean context, did you mean '=='?if baseAddress!= baseAddress2 { // value of optional type 'UnsafeMutableRawPointer?' must be unwrapped to a value of type 'UnsafeMutableRawPointer'if baseAddress!= baseAddress2 { // cannot assign through '!': 'baseAddress' is a 'let' constantif baseAddress!= baseAddress2 { // '=' must have consistent whitespace on both sidesif baseAddress!= baseAddress2 { // use of '=' in a boolean context, did you mean '=='?import CoreVideo
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
var lhsSize = CVPixelBufferGetWidth(lhs) * CVPixelBufferGetHeight(lhs)
var rhsSize = CVPixelBufferGetWidth(rhs) * CVPixelBufferGetHeight(rhs)
if lhsSize!= rhsSize {
return false
}
var lhsPixelFormat = CVPixelBufferGetPixelFormatType(lhs)
var rhsPixelFormat = CVPixelBufferGetPixelFormatType(rhs)
if lhsPixelFormat!= rhsPixelFormat {
return false
}
var lhsBaseAddress = CVPixelBufferGetBaseAddress(lhs)
var rhsBaseAddress = CVPixelBufferGetBaseAddress(rhs)
if lhsBaseAddress!= rhsBaseAddress {
return false
}
return true
}```swift
import CoreVideo
// Custom operator which provides comparison for two CVPixelBuffer objects and returns true if two pixel buffers equal in size, pixel format, and content.
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
var lhsSize = CVPixelBufferGetWidth(lhs) * CVPixelBufferGetHeight(lhs)
var rhsSize = CVPixelBufferGetWidth(rhs) * CVPixelBufferGetHeight(rhs)
if lhsSize!= rhsSize {
return false
}
var lhsPixelFormat = CVPixelBufferGetPixelFormatType(lhs)
var rhsPixelFormat = CVPixelBufferGetPixelFormatType(rhs)
if lhsPixelFormat!= rhsPixelFormat {
return false
}
var lhsBaseAddress = CVPixelBufferGetBaseAddress(lhs)
var rhsBaseAddress = CVPixelBufferGetBaseAddress(rhs)
if lhsBaseAddress!= rhsBaseAddress {
return false
}
return true
}
```if lhsSize!= rhsSize { // use of '=' in a boolean context, did you mean '=='?if lhsSize!= rhsSize { // cannot force unwrap value of non-optional type 'Int'if lhsSize!= rhsSize { // '=' must have consistent whitespace on both sidesif lhsPixelFormat!= rhsPixelFormat { // '=' must have consistent whitespace on both sidesif lhsPixelFormat!= rhsPixelFormat { // cannot force unwrap value of non-optional type 'OSType' (aka 'UInt32')if lhsPixelFormat!= rhsPixelFormat { // use of '=' in a boolean context, did you mean '=='?if lhsBaseAddress!= rhsBaseAddress { // value of optional type 'UnsafeMutableRawPointer?' must be unwrapped to a value of type 'UnsafeMutableRawPointer'if lhsBaseAddress!= rhsBaseAddress { // use of '=' in a boolean context, did you mean '=='?if lhsBaseAddress!= rhsBaseAddress { // '=' must have consistent whitespace on both sidesimport CoreVideo
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
var width = 0
var height = 0
var pixelFormat = 0
var result = false
CVPixelBufferGetWidth(lhs, &width)
CVPixelBufferGetHeight(lhs, &height)
CVPixelBufferGetPixelFormatType(lhs, &pixelFormat)
if CVPixelBufferGetWidth(rhs) == width && CVPixelBufferGetHeight(rhs) == height && CVPixelBufferGetPixelFormatType(rhs) == pixelFormat {
result = true
}
return result
}```swift
import CoreVideo
// Custom operator which provides comparison for two CVPixelBuffer objects and returns true if two pixel buffers equal in size, pixel format, and content.
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
var width = 0
var height = 0
var pixelFormat = 0
var result = false
CVPixelBufferGetWidth(lhs, &width)
CVPixelBufferGetHeight(lhs, &height)
CVPixelBufferGetPixelFormatType(lhs, &pixelFormat)
if CVPixelBufferGetWidth(rhs) == width && CVPixelBufferGetHeight(rhs) == height && CVPixelBufferGetPixelFormatType(rhs) == pixelFormat {
result = true
}
return result
}
```CVPixelBufferGetWidth(lhs, &width) // extra argument in callCVPixelBufferGetHeight(lhs, &height) // extra argument in callCVPixelBufferGetPixelFormatType(lhs, &pixelFormat) // extra argument in callimport CoreVideo
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
var width = 0, height = 0, bytesPerRow = 0, bytesPerPixel = 0
let result = CVPixelBufferGetWidth(lhs, &width) &&
CVPixelBufferGetHeight(lhs, &height) &&
CVPixelBufferGetBytesPerRow(lhs, &bytesPerRow) &&
CVPixelBufferGetBytesPerPixel(lhs, &bytesPerPixel)
return result &&
width == CVPixelBufferGetWidth(rhs, nil) &&
height == CVPixelBufferGetHeight(rhs, nil) &&
bytesPerRow == CVPixelBufferGetBytesPerRow(rhs, nil) &&
bytesPerPixel == CVPixelBufferGetBytesPerPixel(rhs, nil) &&
CVPixelBufferIsPlanar(lhs) == CVPixelBufferIsPlanar(rhs) &&
CVPixelBufferIsPlanar(lhs)?
CVPixelBufferIsPlanar(lhs)?
CVPixelBufferIsPlanar(lhs)?
CVPixelBufferIsPlanar(lhs)?
CVPixelBufferIsPlanar(lhs)?
CVPixelBufferIsPlanar(lhs)?
CVPixelBufferIsPlanar(lhs)?
CVPixelBufferIsPlanar(lhs) :
CVPixelBufferIsPlanar(lhs) :
CVPixelBufferIsPlanar(lhs) :
CVPixelBufferIsPlanar(lhs) :
CVPixelBufferIsPlanar(lhs) :
CVPixelBufferIsPlanar(lhs) :
CVPixelBufferIsPlanar(lhs) :
CVPixelBufferIsPlanar(lhs)
}```swift
import CoreVideo
// Custom operator which provides comparison for two CVPixelBuffer objects and returns true if two pixel buffers equal in size, pixel format, and content.
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
var width = 0, height = 0, bytesPerRow = 0, bytesPerPixel = 0
let result = CVPixelBufferGetWidth(lhs, &width) &&
CVPixelBufferGetHeight(lhs, &height) &&
CVPixelBufferGetBytesPerRow(lhs, &bytesPerRow) &&
CVPixelBufferGetBytesPerPixel(lhs, &bytesPerPixel)
return result &&
width == CVPixelBufferGetWidth(rhs, nil) &&
height == CVPixelBufferGetHeight(rhs, nil) &&
bytesPerRow == CVPixelBufferGetBytesPerRow(rhs, nil) &&
bytesPerPixel == CVPixelBufferGetBytesPerPixel(rhs, nil) &&
CVPixelBufferIsPlanar(lhs) == CVPixelBufferIsPlanar(rhs) &&
CVPixelBufferIsPlanar(lhs)?
CVPixelBufferIsPlanar(lhs)?
CVPixelBufferIsPlanar(lhs)?
CVPixelBufferIsPlanar(lhs)?
CVPixelBufferIsPlanar(lhs)?
CVPixelBufferIsPlanar(lhs)?
CVPixelBufferIsPlanar(lhs)?
CVPixelBufferIsPlanar(lhs) :
CVPixelBufferIsPlanar(lhs) :
CVPixelBufferIsPlanar(lhs) :
CVPixelBufferIsPlanar(lhs) :
CVPixelBufferIsPlanar(lhs) :
CVPixelBufferIsPlanar(lhs) :
CVPixelBufferIsPlanar(lhs) :
CVPixelBufferIsPlanar(lhs)
}
```let result = CVPixelBufferGetWidth(lhs, &width) && // type 'Int' cannot be used as a boolean; test for '!= 0' insteadlet result = CVPixelBufferGetWidth(lhs, &width) && // extra argument in callCVPixelBufferGetHeight(lhs, &height) && // extra argument in callCVPixelBufferGetHeight(lhs, &height) && // type 'Int' cannot be used as a boolean; test for '!= 0' insteadCVPixelBufferGetBytesPerRow(lhs, &bytesPerRow) && // extra argument in callCVPixelBufferGetBytesPerRow(lhs, &bytesPerRow) && // type 'Int' cannot be used as a boolean; test for '!= 0' insteadCVPixelBufferGetBytesPerPixel(lhs, &bytesPerPixel) // cannot find 'CVPixelBufferGetBytesPerPixel' in scopewidth == CVPixelBufferGetWidth(rhs, nil) && // 'nil' requires a contextual typewidth == CVPixelBufferGetWidth(rhs, nil) && // extra argument in callheight == CVPixelBufferGetHeight(rhs, nil) && // 'nil' requires a contextual typeheight == CVPixelBufferGetHeight(rhs, nil) && // extra argument in callbytesPerRow == CVPixelBufferGetBytesPerRow(rhs, nil) && // extra argument in callbytesPerRow == CVPixelBufferGetBytesPerRow(rhs, nil) && // 'nil' requires a contextual typebytesPerPixel == CVPixelBufferGetBytesPerPixel(rhs, nil) && // 'nil' requires a contextual typebytesPerPixel == CVPixelBufferGetBytesPerPixel(rhs, nil) && // cannot find 'CVPixelBufferGetBytesPerPixel' in scopeCVPixelBufferIsPlanar(lhs)? // cannot use optional chaining on non-optional value of type 'Bool'CVPixelBufferIsPlanar(lhs)? // optional type 'Bool?' cannot be used as a boolean; test for '!= nil' insteadCVPixelBufferIsPlanar(lhs)? // cannot use optional chaining on non-optional value of type 'Bool'CVPixelBufferIsPlanar(lhs)? // cannot use optional chaining on non-optional value of type 'Bool'CVPixelBufferIsPlanar(lhs)? // cannot use optional chaining on non-optional value of type 'Bool'CVPixelBufferIsPlanar(lhs)? // cannot use optional chaining on non-optional value of type 'Bool'CVPixelBufferIsPlanar(lhs)? // cannot use optional chaining on non-optional value of type 'Bool'CVPixelBufferIsPlanar(lhs)? // cannot use optional chaining on non-optional value of type 'Bool'CVPixelBufferIsPlanar(lhs) : // expected expressionCVPixelBufferIsPlanar(lhs) : // consecutive statements on a line must be separated by ';'import CoreVideo
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
var lhsSize = CVPixelBufferGetWidth(lhs)
var lhsHeight = CVPixelBufferGetHeight(lhs)
var lhsPixelFormat = CVPixelBufferGetPixelFormatType(lhs)
var lhsBytesPerRow = CVPixelBufferGetBytesPerRow(lhs)
var lhsBaseAddress = CVPixelBufferGetBaseAddress(lhs)
var rhsSize = CVPixelBufferGetWidth(rhs)
var rhsHeight = CVPixelBufferGetHeight(rhs)
var rhsPixelFormat = CVPixelBufferGetPixelFormatType(rhs)
var rhsBytesPerRow = CVPixelBufferGetBytesPerRow(rhs)
var rhsBaseAddress = CVPixelBufferGetBaseAddress(rhs)
if lhsSize!= rhsSize || lhsHeight!= rhsHeight || lhsPixelFormat!= rhsPixelFormat || lhsBytesPerRow!= rhsBytesPerRow || lhsBaseAddress!= rhsBaseAddress {
return false
}
return true
}```swift
import CoreVideo
// Custom operator which provides comparison for two CVPixelBuffer objects and returns true if two pixel buffers equal in size, pixel format, and content.
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
var lhsSize = CVPixelBufferGetWidth(lhs)
var lhsHeight = CVPixelBufferGetHeight(lhs)
var lhsPixelFormat = CVPixelBufferGetPixelFormatType(lhs)
var lhsBytesPerRow = CVPixelBufferGetBytesPerRow(lhs)
var lhsBaseAddress = CVPixelBufferGetBaseAddress(lhs)
var rhsSize = CVPixelBufferGetWidth(rhs)
var rhsHeight = CVPixelBufferGetHeight(rhs)
var rhsPixelFormat = CVPixelBufferGetPixelFormatType(rhs)
var rhsBytesPerRow = CVPixelBufferGetBytesPerRow(rhs)
var rhsBaseAddress = CVPixelBufferGetBaseAddress(rhs)
if lhsSize!= rhsSize || lhsHeight!= rhsHeight || lhsPixelFormat!= rhsPixelFormat || lhsBytesPerRow!= rhsBytesPerRow || lhsBaseAddress!= rhsBaseAddress {
return false
}
return true
}
```if lhsSize!= rhsSize || lhsHeight!= rhsHeight || lhsPixelFormat!= rhsPixelFormat || lhsBytesPerRow!= rhsBytesPerRow || lhsBaseAddress!= rhsBaseAddress { // type 'Int' cannot be used as a boolean; test for '!= 0' insteadif lhsSize!= rhsSize || lhsHeight!= rhsHeight || lhsPixelFormat!= rhsPixelFormat || lhsBytesPerRow!= rhsBytesPerRow || lhsBaseAddress!= rhsBaseAddress { // cannot force unwrap value of non-optional type 'Int'if lhsSize!= rhsSize || lhsHeight!= rhsHeight || lhsPixelFormat!= rhsPixelFormat || lhsBytesPerRow!= rhsBytesPerRow || lhsBaseAddress!= rhsBaseAddress { // '=' must have consistent whitespace on both sidesif lhsSize!= rhsSize || lhsHeight!= rhsHeight || lhsPixelFormat!= rhsPixelFormat || lhsBytesPerRow!= rhsBytesPerRow || lhsBaseAddress!= rhsBaseAddress { // cannot convert value of type 'UnsafeMutableRawPointer' to expected argument type 'Bool'if lhsSize!= rhsSize || lhsHeight!= rhsHeight || lhsPixelFormat!= rhsPixelFormat || lhsBytesPerRow!= rhsBytesPerRow || lhsBaseAddress!= rhsBaseAddress { // type 'OSType' (aka 'UInt32') cannot be used as a boolean; test for '!= 0' insteadif lhsSize!= rhsSize || lhsHeight!= rhsHeight || lhsPixelFormat!= rhsPixelFormat || lhsBytesPerRow!= rhsBytesPerRow || lhsBaseAddress!= rhsBaseAddress { // '=' must have consistent whitespace on both sidesif lhsSize!= rhsSize || lhsHeight!= rhsHeight || lhsPixelFormat!= rhsPixelFormat || lhsBytesPerRow!= rhsBytesPerRow || lhsBaseAddress!= rhsBaseAddress { // type 'Int' cannot be used as a boolean; test for '!= 0' insteadif lhsSize!= rhsSize || lhsHeight!= rhsHeight || lhsPixelFormat!= rhsPixelFormat || lhsBytesPerRow!= rhsBytesPerRow || lhsBaseAddress!= rhsBaseAddress { // cannot force unwrap value of non-optional type 'Int'if lhsSize!= rhsSize || lhsHeight!= rhsHeight || lhsPixelFormat!= rhsPixelFormat || lhsBytesPerRow!= rhsBytesPerRow || lhsBaseAddress!= rhsBaseAddress { // cannot assign value of type '()' to type 'Int'if lhsSize!= rhsSize || lhsHeight!= rhsHeight || lhsPixelFormat!= rhsPixelFormat || lhsBytesPerRow!= rhsBytesPerRow || lhsBaseAddress!= rhsBaseAddress { // '=' must have consistent whitespace on both sidesif lhsSize!= rhsSize || lhsHeight!= rhsHeight || lhsPixelFormat!= rhsPixelFormat || lhsBytesPerRow!= rhsBytesPerRow || lhsBaseAddress!= rhsBaseAddress { // type 'Int' cannot be used as a boolean; test for '!= 0' insteadif lhsSize!= rhsSize || lhsHeight!= rhsHeight || lhsPixelFormat!= rhsPixelFormat || lhsBytesPerRow!= rhsBytesPerRow || lhsBaseAddress!= rhsBaseAddress { // type 'OSType' (aka 'UInt32') cannot be used as a boolean; test for '!= 0' insteadif lhsSize!= rhsSize || lhsHeight!= rhsHeight || lhsPixelFormat!= rhsPixelFormat || lhsBytesPerRow!= rhsBytesPerRow || lhsBaseAddress!= rhsBaseAddress { // type 'Int' cannot be used as a boolean; test for '!= 0' insteadif lhsSize!= rhsSize || lhsHeight!= rhsHeight || lhsPixelFormat!= rhsPixelFormat || lhsBytesPerRow!= rhsBytesPerRow || lhsBaseAddress!= rhsBaseAddress { // use of '=' in a boolean context, did you mean '=='?if lhsSize!= rhsSize || lhsHeight!= rhsHeight || lhsPixelFormat!= rhsPixelFormat || lhsBytesPerRow!= rhsBytesPerRow || lhsBaseAddress!= rhsBaseAddress { // cannot force unwrap value of non-optional type 'OSType' (aka 'UInt32')if lhsSize!= rhsSize || lhsHeight!= rhsHeight || lhsPixelFormat!= rhsPixelFormat || lhsBytesPerRow!= rhsBytesPerRow || lhsBaseAddress!= rhsBaseAddress { // '=' must have consistent whitespace on both sidesif lhsSize!= rhsSize || lhsHeight!= rhsHeight || lhsPixelFormat!= rhsPixelFormat || lhsBytesPerRow!= rhsBytesPerRow || lhsBaseAddress!= rhsBaseAddress { // '=' must have consistent whitespace on both sidesif lhsSize!= rhsSize || lhsHeight!= rhsHeight || lhsPixelFormat!= rhsPixelFormat || lhsBytesPerRow!= rhsBytesPerRow || lhsBaseAddress!= rhsBaseAddress { // cannot force unwrap value of non-optional type 'Int'if lhsSize!= rhsSize || lhsHeight!= rhsHeight || lhsPixelFormat!= rhsPixelFormat || lhsBytesPerRow!= rhsBytesPerRow || lhsBaseAddress!= rhsBaseAddress { // type 'Int' cannot be used as a boolean; test for '!= 0' insteadimport CoreVideo
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
var width = 0
var height = 0
var pixelFormatType = 0
var result = false
CVPixelBufferGetWidth(lhs, &width)
CVPixelBufferGetHeight(lhs, &height)
CVPixelBufferGetPixelFormatType(lhs, &pixelFormatType)
if CVPixelBufferGetWidth(rhs) == width &&
CVPixelBufferGetHeight(rhs) == height &&
CVPixelBufferGetPixelFormatType(rhs) == pixelFormatType {
result = true
}
return result
}```swift
import CoreVideo
// Custom operator which provides comparison for two CVPixelBuffer objects and returns true if two pixel buffers equal in size, pixel format, and content.
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
var width = 0
var height = 0
var pixelFormatType = 0
var result = false
CVPixelBufferGetWidth(lhs, &width)
CVPixelBufferGetHeight(lhs, &height)
CVPixelBufferGetPixelFormatType(lhs, &pixelFormatType)
if CVPixelBufferGetWidth(rhs) == width &&
CVPixelBufferGetHeight(rhs) == height &&
CVPixelBufferGetPixelFormatType(rhs) == pixelFormatType {
result = true
}
return result
}
```CVPixelBufferGetWidth(lhs, &width) // extra argument in callCVPixelBufferGetHeight(lhs, &height) // extra argument in callCVPixelBufferGetPixelFormatType(lhs, &pixelFormatType) // extra argument in callimport CoreVideo
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
var width = 0
var height = 0
var pixelFormat = 0
var result = false
let status = CVPixelBufferGetWidth(lhs, &width)
if status == kCVReturnSuccess {
let status = CVPixelBufferGetHeight(lhs, &height)
if status == kCVReturnSuccess {
let status = CVPixelBufferGetPixelFormatType(lhs, &pixelFormat)
if status == kCVReturnSuccess {
result = CVPixelBufferGetWidth(rhs) == width &&
CVPixelBufferGetHeight(rhs) == height &&
CVPixelBufferGetPixelFormatType(rhs) == pixelFormat
}
}
}
return result
}```swift
import CoreVideo
// Custom operator which provides comparison for two CVPixelBuffer objects and returns true if two pixel buffers equal in size, pixel format, and content.
func ==(lhs: CVPixelBuffer, rhs: CVPixelBuffer) -> Bool {
var width = 0
var height = 0
var pixelFormat = 0
var result = false
let status = CVPixelBufferGetWidth(lhs, &width)
if status == kCVReturnSuccess {
let status = CVPixelBufferGetHeight(lhs, &height)
if status == kCVReturnSuccess {
let status = CVPixelBufferGetPixelFormatType(lhs, &pixelFormat)
if status == kCVReturnSuccess {
result = CVPixelBufferGetWidth(rhs) == width &&
CVPixelBufferGetHeight(rhs) == height &&
CVPixelBufferGetPixelFormatType(rhs) == pixelFormat
}
}
}
return result
}
```let status = CVPixelBufferGetWidth(lhs, &width) // extra argument in calllet status = CVPixelBufferGetHeight(lhs, &height) // extra argument in calllet status = CVPixelBufferGetPixelFormatType(lhs, &pixelFormat) // extra argument in callstruct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
func reveal(items: [PrivateItem]) -> [PublicItem] {
return items.map { PublicItem(value: $0.value) }
}```swift
struct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
// Function to convert an array of structs with private integer fields into an array of public structs with identical integer fields by directly reinterpreting memory, assuming the structs have the same memory layout and alignment.
func reveal(items: [PrivateItem]) -> [PublicItem] {
return items.map { PublicItem(value: $0.value) }
}
```return items.map { PublicItem(value: $0.value) } // 'value' is inaccessible due to 'private' protection levelstruct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
func reveal(items: [PrivateItem]) -> [PublicItem] {
return items.map { PublicItem(value: $0.value) }
}```swift
struct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
// Function to convert an array of structs with private integer fields into an array of public structs with identical integer fields by directly reinterpreting memory, assuming the structs have the same memory layout and alignment.
func reveal(items: [PrivateItem]) -> [PublicItem] {
return items.map { PublicItem(value: $0.value) }
}
```return items.map { PublicItem(value: $0.value) } // 'value' is inaccessible due to 'private' protection levelstruct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
func reveal(items: [PrivateItem]) -> [PublicItem] {
return items.map {
PublicItem(value: $0.value)
}
}```swift
struct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
// Function to convert an array of structs with private integer fields into an array of public structs with identical integer fields by directly reinterpreting memory, assuming the structs have the same memory layout and alignment.
func reveal(items: [PrivateItem]) -> [PublicItem] {
return items.map {
PublicItem(value: $0.value)
}
}
```PublicItem(value: $0.value) // 'value' is inaccessible due to 'private' protection levelstruct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
func reveal(items: [PrivateItem]) -> [PublicItem] {
return items.map {
PublicItem(value: $0.value)
}
}```swift
struct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
// Function to convert an array of structs with private integer fields into an array of public structs with identical integer fields by directly reinterpreting memory, assuming the structs have the same memory layout and alignment.
func reveal(items: [PrivateItem]) -> [PublicItem] {
return items.map {
PublicItem(value: $0.value)
}
}
```PublicItem(value: $0.value) // 'value' is inaccessible due to 'private' protection levelstruct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
func reveal(items: [PrivateItem]) -> [PublicItem] {
let publicItems = items.map {
return PublicItem(value: $0.value)
}
return publicItems
}```swift
struct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
// Function to convert an array of structs with private integer fields into an array of public structs with identical integer fields by directly reinterpreting memory, assuming the structs have the same memory layout and alignment.
func reveal(items: [PrivateItem]) -> [PublicItem] {
let publicItems = items.map {
return PublicItem(value: $0.value)
}
return publicItems
}
```return PublicItem(value: $0.value) // 'value' is inaccessible due to 'private' protection levelstruct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
func reveal(items: [PrivateItem]) -> [PublicItem] {
var publicItems = [PublicItem](repeating: PublicItem(value: 0), count: items.count)
for i in 0..<items.count {
publicItems[i].value = items[i].value
}
return publicItems
}```swift
struct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
// Function to convert an array of structs with private integer fields into an array of public structs with identical integer fields by directly reinterpreting memory, assuming the structs have the same memory layout and alignment.
func reveal(items: [PrivateItem]) -> [PublicItem] {
var publicItems = [PublicItem](repeating: PublicItem(value: 0), count: items.count)
for i in 0..<items.count {
publicItems[i].value = items[i].value
}
return publicItems
}
```publicItems[i].value = items[i].value // 'value' is inaccessible due to 'private' protection levelpublicItems[i].value = items[i].value // cannot assign to property: 'value' is a 'let' constantstruct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
func reveal(items: [PrivateItem]) -> [PublicItem] {
return items.map { PublicItem(value: $0.value) }
}```swift
struct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
// Function to convert an array of structs with private integer fields into an array of public structs with identical integer fields by directly reinterpreting memory, assuming the structs have the same memory layout and alignment.
func reveal(items: [PrivateItem]) -> [PublicItem] {
return items.map { PublicItem(value: $0.value) }
}
```return items.map { PublicItem(value: $0.value) } // 'value' is inaccessible due to 'private' protection levelstruct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
func reveal(items: [PrivateItem]) -> [PublicItem] {
return items.map {
return PublicItem(value: $0.value)
}
}```swift
struct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
// Function to convert an array of structs with private integer fields into an array of public structs with identical integer fields by directly reinterpreting memory, assuming the structs have the same memory layout and alignment.
func reveal(items: [PrivateItem]) -> [PublicItem] {
return items.map {
return PublicItem(value: $0.value)
}
}
// Function to convert an array of structs with private integer fields into an array of public structs with identical integer fields by copying the memory.
func reveal(items: [PrivateItem]) -> [PublicItem] {
return items.map {
return PublicItem(value: $0.value)
}
}
```return PublicItem(value: $0.value) // 'value' is inaccessible due to 'private' protection levelstruct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
func reveal(items: [PrivateItem]) -> [PublicItem] {
return items.map {
return PublicItem(value: $0.value)
}
}```swift
struct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
// Function to convert an array of structs with private integer fields into an array of public structs with identical integer fields by directly reinterpreting memory, assuming the structs have the same memory layout and alignment.
func reveal(items: [PrivateItem]) -> [PublicItem] {
return items.map {
return PublicItem(value: $0.value)
}
}
```return PublicItem(value: $0.value) // 'value' is inaccessible due to 'private' protection levelstruct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
func reveal(items: [PrivateItem]) -> [PublicItem] {
return items.map {
PublicItem(value: $0.value)
}
}```swift
struct PrivateItem {
private let value: Int
init(value: Int) {
self.value = value
}
}
struct PublicItem {
let value: Int
}
// Function to convert an array of structs with private integer fields into an array of public structs with identical integer fields by directly reinterpreting memory, assuming the structs have the same memory layout and alignment.
func reveal(items: [PrivateItem]) -> [PublicItem] {
return items.map {
PublicItem(value: $0.value)
}
}
```PublicItem(value: $0.value) // 'value' is inaccessible due to 'private' protection levelenum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
// TODO: Implement this function
}```swift
enum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
// Function that compares two version number strings (created with respect of semantic versioning specification including "alpha" and "beta" tags) and returning their ordering as a value of type ComparisonResult.
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
// TODO: Implement this function
}
// Test cases
compareVersions("1.0.0", "1.0.0") ==.orderedSame
compareVersions("1.0.0", "1.0.1") ==.orderedAscending
compareVersions("1.0.0", "1.1.0") ==.orderedAscending
compareVersions("1.0.0", "1.0.0-alpha") ==.orderedAscending
compareVersions("1.0.0", "1.0.0-beta") ==.orderedAscending
compareVersions("1.0.0", "1.0.0-alpha.1") ==.orderedAscending
compareVersions("1.0.0", "1.0.0-beta.2") ==.orderedAscending
compareVersions("1.0.0-alpha", "1.0.0-beta") ==.orderedAscending
compareVersions("1.0.0-alpha.1", "1.0.0-beta.2") ==.orderedAscending
compareVersions("1.0.0-alpha.beta", "1.0.0-beta.alpha") ==.orderedAscending
compareVersions("1.0.0-alpha.1", "1.0.0-alpha.beta") ==.orderedAscending
compareVersions("1.0.0-beta", "1.0.0-beta.2") ==.orderedAscending
compareVersions("1.0.0-beta.2", "1.0.0-beta.11") ==.orderedAscending
compareVersions("1.0.0-beta.2", "1.0.0-rc.1") ==.orderedAscending
compareVersions("1.0.0-rc.1", "1.0.0") ==.orderedDescending
compareVersions("1.0.0-rc.1", "2.0.0") ==.orderedAscending
compareVersions("1.0.0-rc.1", "1.1.0") ==.orderedAscending
compareVersions("1.0.0-rc.1", "1.0.1") ==.orderedAscending
compareVersions("1.0.0-rc.1", "1.0.0-alpha") ==.orderedDescending
compareVersions("1.0.0-rc.1", "1.0.0-beta") ==.orderedDescending
compareVersions("1.0.0-rc.1", "1.0.0-alpha.1") ==.orderedDescending
compareVersions("1.0.0-rc.1", "1.0.0-beta.2") ==.orderedDescending
compareVersions("1.0.0-rc.1", "1.0.0-beta") ==.orderedDescending
compareVersions("1.0.0-rc.1", "1.0.0-beta.2") ==.orderedDescending
compareVersions("1.0.0-rc.1", "1.0.0-beta.11") ==.orderedDescending
compareVersions("1.0.0-rc.1", "1.0.0-rc.1") ==.orderedSame
compareVersions("1.0.0-rc.1", "1.0.0-rc.2") ==.orderedAscending
compareVersions("1.0.0-rc.1", "1.0.0-rc.11") ==.orderedAscending
compareVersions("1.0.0-rc.1", "1.0.0-rc.1-alpha") ==.orderedAscending
compareVersions("1.0.0-rc.1", "1.0.0-rc.1-beta") ==.orderedAscending
compareVersions("1.0.0-rc.1", "1.0.0-rc.1-alpha.1") ==.orderedAscending
compareVersions("1.0.0-rc.1", "1.0.0-rc.1-beta.2") ==.orderedAscending
compareVersions("1.0.0-rc.1", "1.0.0-rc.1-beta") ==.orderedDescending
compareVersions("1.0.0-rc.1", "1.0.0-rc.1-beta.2") ==.orderedDescending
compareVersions("1.0.0-rc.1", "1.0.0-rc.1-beta.11") ==.orderedDescending
compareVersions("1.0.0-rc.1", "1.0.0-rc.1-rc.2") ==.orderedAscending
compareVersions("1.0} // missing return in global function expected to return 'ComparisonResult'enum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
// Your implementation here
}```swift
enum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
// Function that compares two version number strings (created with respect of semantic versioning specification including "alpha" and "beta" tags) and returning their ordering as a value of type ComparisonResult.
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
// Your implementation here
}
```} // missing return in global function expected to return 'ComparisonResult'enum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
// TODO: Implement this function
}```swift
enum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
// Function that compares two version number strings (created with respect of semantic versioning specification including "alpha" and "beta" tags) and returning their ordering as a value of type ComparisonResult.
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
// TODO: Implement this function
}
```} // missing return in global function expected to return 'ComparisonResult'enum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
//...
}```swift
enum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
// Function that compares two version number strings (created with respect of semantic versioning specification including "alpha" and "beta" tags) and returning their ordering as a value of type ComparisonResult.
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
//...
}
```} // missing return in global function expected to return 'ComparisonResult'enum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
//...
}```swift
enum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
// Function that compares two version number strings (created with respect of semantic versioning specification including "alpha" and "beta" tags) and returning their ordering as a value of type ComparisonResult.
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
//...
}
```} // missing return in global function expected to return 'ComparisonResult'enum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
// Write your code here
}```swift
enum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
// Function that compares two version number strings (created with respect of semantic versioning specification including "alpha" and "beta" tags) and returning their ordering as a value of type ComparisonResult.
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
// Write your code here
}
```} // missing return in global function expected to return 'ComparisonResult'enum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
//...
}```swift
enum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
// Function that compares two version number strings (created with respect of semantic versioning specification including "alpha" and "beta" tags) and returning their ordering as a value of type ComparisonResult.
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
//...
}
```} // missing return in global function expected to return 'ComparisonResult'enum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
// TODO: Implement this function
}```swift
enum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
// Function that compares two version number strings (created with respect of semantic versioning specification including "alpha" and "beta" tags) and returning their ordering as a value of type ComparisonResult.
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
// TODO: Implement this function
}
// Tests
print(compareVersions("1.0.0", "1.0.0")) // orderedSame
print(compareVersions("1.0.0", "1.0.1")) // orderedAscending
print(compareVersions("1.0.0", "1.1.0")) // orderedAscending
print(compareVersions("1.0.0", "2.0.0")) // orderedAscending
print(compareVersions("1.0.0", "1.0.0-alpha")) // orderedAscending
print(compareVersions("1.0.0", "1.0.0-beta")) // orderedAscending
print(compareVersions("1.0.0-alpha", "1.0.0-beta")) // orderedAscending
print(compareVersions("1.0.0-beta", "1.0.0")) // orderedDescending
print(compareVersions("1.0.0-beta", "1.0.0-alpha")) // orderedDescending
print(compareVersions("1.0.0-alpha", "1.0.0")) // orderedDescending
print(compareVersions("1.0.0-alpha", "1.0.0-beta")) // orderedDescending
print(compareVersions("1.0.0-alpha", "1.0.0-alpha.1")) // orderedAscending
print(compareVersions("1.0.0-alpha.1", "1.0.0-alpha.2")) // orderedAscending
print(compareVersions("1.0.0-alpha.2", "1.0.0-beta.1")) // orderedAscending
print(compareVersions("1.0.0-beta.1", "1.0.0-beta.2")) // orderedAscending
print(compareVersions("1.0.0-beta.2", "1.0.0-rc.1")) // orderedAscending
print(compareVersions("1.0.0-rc.1", "1.0.0")) // orderedDescending
print(compareVersions("1.0.0-rc.1", "1.0.0-beta.2")) // orderedDescending
print(compareVersions("1.0.0-rc.1", "1.0.0-beta.1")) // orderedDescending
print(compareVersions("1.0.0-rc.1", "1.0.0-alpha.2")) // orderedDescending
print(compareVersions("1.0.0-rc.1", "1.0.0-alpha.1")) // orderedDescending
print(compareVersions("1.0.0-rc.1", "1.0.0-alpha")) // orderedDescending
print(compareVersions("1.0.0-rc.1", "1.0.0-alpha.1-beta")) // orderedDescending
print(compareVersions("1.0.0-rc.1-beta", "1.0.0-alpha.1")) // orderedDescending
print(compareVersions("1.0.0-rc.1-beta", "1.0.0-alpha")) // orderedDescending
print(compareVersions("1.0.0-rc.1-beta", "1.0.0-alpha.1-beta")) // orderedDescending
print(compareVersions("1.0.0-rc.1-beta", "1.0.0-alpha.1-beta.2")) // orderedDescending
print(compareVersions("1.0.0-rc.1-beta.2", "1.0.0-alpha.1-beta.1")) // orderedDescending
print(compareVersions("1.0.0-rc.1-beta.2", "1.0.0-alpha.1")) // orderedDescending
print(compareVersions("1.0.0-rc.1-beta.2", "1.0.0-alpha")) // orderedDescending
print(compareVersions("1.0.0-rc.1-beta.2", "1.0.0-alpha.1-beta")) // orderedDescending
print(compareVersions("1.0.0-rc.1-beta.2", "1.0.0-alpha.1-beta.2")) // orderedSame
print(compareVersions("1.0.0-rc.1-beta.2", "1.0.0-alpha.1-beta.3")) // orderedDescending
print(compareVersions("1.0.0-rc.1-beta.2", "1.0.0-alpha.1-beta.11")) // orderedDescending
print(compareVersions("1} // missing return in global function expected to return 'ComparisonResult'enum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
// TODO: Implement this function
}```swift
enum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
// Function that compares two version number strings (created with respect of semantic versioning specification including "alpha" and "beta" tags) and returning their ordering as a value of type ComparisonResult.
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
// TODO: Implement this function
}
```} // missing return in global function expected to return 'ComparisonResult'enum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
// Your code goes here
}```swift
enum ComparisonResult {
case orderedSame
case orderedAscending
case orderedDescending
}
// Function that compares two version number strings (created with respect of semantic versioning specification including "alpha" and "beta" tags) and returning their ordering as a value of type ComparisonResult.
func compareVersions(_ lhs: String, _ rhs: String) -> ComparisonResult {
// Your code goes here
}
// Tests
print(compareVersions("1.0.0", "1.0.0")) // orderedSame
print(compareVersions("1.0.0", "2.0.0")) // orderedAscending
print(compareVersions("1.0.0", "0.9.0")) // orderedDescending
print(compareVersions("1.0.0", "1.0.0-alpha")) // orderedAscending
print(compareVersions("1.0.0", "1.0.0-beta")) // orderedAscending
print(compareVersions("1.0.0-alpha", "1.0.0-beta")) // orderedAscending
print(compareVersions("1.0.0-beta", "1.0.0-alpha")) // orderedDescending
print(compareVersions("1.0.0-beta", "1.0.0")) // orderedDescending
print(compareVersions("1.0.0-alpha", "1.0.0")) // orderedDescending
print(compareVersions("1.0.0-alpha", "1.0.0-alpha.1")) // orderedAscending
print(compareVersions("1.0.0-alpha.1", "1.0.0-alpha.2")) // orderedAscending
print(compareVersions("1.0.0-alpha.2", "1.0.0-beta.1")) // orderedAscending
print(compareVersions("1.0.0-beta.1", "1.0.0-beta.2")) // orderedAscending
print(compareVersions("1.0.0-beta.2", "1.0.0-rc.1")) // orderedAscending
print(compareVersions("1.0.0-rc.1", "1.0.0")) // orderedDescending
print(compareVersions("1.0.0-rc.1", "1.0.0-rc.2")) // orderedAscending
print(compareVersions("1.0.0-rc.2", "1.0.0-rc.10")) // orderedAscending
print(compareVersions("1.0.0-rc.10", "1.0.0-rc.11")) // orderedAscending
print(compareVersions("1.0.0-rc.11", "1.0.0-rc.1")) // orderedDescending
print(compareVersions("1.0.0-rc.1", "1.0.0-rc.1.1")) // orderedAscending
print(compareVersions("1.0.0-rc.1.1", "1.0.0-rc.1.2")) // orderedAscending
print(compareVersions("1.0.0-rc.1.2", "1.0.0-rc.2")) // orderedAscending
print(compareVersions("1.0.0-rc.2", "1.0.0-rc.1")) // orderedDescending
print(compareVersions("1.0.0-rc.1", "1.0.0-rc.1.1")) // orderedDescending
print(compareVersions("1.0.0-rc.1.1", "1.0.0-rc.1.0")) // orderedDescending
print(compareVersions("1.0.0-rc.1.0", "1.0.0-rc.1")) // orderedDescending
print(compareVersions("1.0.0-rc.1", "1.0.0-rc.0")) // orderedDescending
print(compareVersions("1.0.0-rc.0", "1.0.0-rc.1")) // orderedAscending
print(compareVersions("1.0.0-rc.0", "1.0.0-rc.0.1")) // orderedAscending
print(compareVersions("1.0.0-rc.0.1", "1.0.0-rc.0.2")) // orderedAscending
print(compareVersions("1.0.0-rc.0.2", "1.0.0-rc.0")) // orderedDescending
print(compareVersions("1.0.0-rc.0", "1.0.0-rc.0.1")) // orderedDescending
print(compareVersions("1.0.0-rc.0.1", "1.0.0-rc.0.0")) // orderedDescending
print(compareVersions("1.0.0-rc.0.0", "1.0.0-rc.0")) // orderedDescending
print(compareVersions("1.0.0-rc.0", "} // missing return in global function expected to return 'ComparisonResult'