Anton Kaliuzhnyi 0xMarK
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| try await withThrowingTaskGroup(of: LoginTaskResult.self) { group in | |
| group.addTask(operation: fetchLocation) | |
| group.addTask(operation: askForUserPermissions) | |
| group.addTask(priority: .high) { | |
| return .client(try await APIClient.connect()) | |
| } | |
| var client: APIClient! | |
| for try await result in group { | |
| if case LoginTaskResult.client(let api) = result { | |
| client = api |
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| Task { | |
| await withDiscardingTaskGroup { group in | |
| for asset in allAssets { | |
| group.addTask { | |
| asset.load() | |
| } | |
| } | |
| } | |
| } |
0xMarK
/ EmptyToNil.swift
Created
October 20, 2023 08:12
Property wrapper to turn empty collection into nil
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| import Foundation | |
| @propertyWrapper | |
| struct EmptyToNil<WrappedType: Codable & Collection>: Codable { | |
| let wrappedValue: WrappedType? | |
| init(wrappedValue: WrappedType?) { | |
| self.wrappedValue = wrappedValue | |
| } |
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| func insertionSort(_ array: [Int]) -> [Int] { | |
| guard array.count > 1 else { return array } | |
| var sorted = array | |
| for i in 1..<array.count { | |
| let current = sorted[i] | |
| var next: Int? | |
| for j in 0...i { | |
| if next == nil, | |
| current < sorted[j] { | |
| next = current |
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| func selectionSort(_ array: [Int]) -> [Int] { | |
| guard array.count > 1 else { return array } | |
| var sorted = array | |
| var smallestIndex = 0 | |
| for i in 0..<array.count { | |
| for j in (i + 1)..<array.count { | |
| if sorted[j] < sorted[smallestIndex] { | |
| smallestIndex = j | |
| } | |
| } |
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| func bubbleSort(_ array: [Int]) -> [Int] { | |
| guard array.count > 1 else { return array } | |
| var sorted = array | |
| var length = array.count | |
| while length > 1 { | |
| for i in 1..<length { | |
| if sorted[i - 1] > sorted[i] { | |
| let current = sorted[i] | |
| sorted[i] = sorted[i - 1] | |
| sorted[i - 1] = current |
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| func reverseStringRecursive(_ string: String) -> String { | |
| guard !string.isEmpty else { return string } | |
| return reverseStringRecursive(String(string.suffix(string.count - 1))) + String(string[string.index(string.startIndex, offsetBy: 0)]) | |
| } | |
| func reverseStringIterative(_ string: String) -> String { | |
| var result = "" | |
| for i in (0..<string.count).reversed() { | |
| result += String(string[string.index(string.startIndex, offsetBy: i)]) | |
| } |
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| func fibonacciRecursive(_ index: Int) -> Int { | |
| if index < 2 { | |
| return index | |
| } | |
| return fibonacciRecursive(index - 2) + fibonacciRecursive(index - 1) | |
| } | |
| func fibonacciIterative(_ index: Int) -> Int { | |
| if index < 2 { | |
| return index |
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| func factorialRecursive(_ number: Int) -> Int { | |
| if number < 3 { | |
| return number | |
| } | |
| return number * factorialRecursive(number - 1) | |
| } | |
| func factorialIterative(_ number: Int) -> Int { | |
| var result = 1 | |
| for i in (2...number) { |
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| class ChatViewController: UIViewController { | |
| override func viewDidLoad() { | |
| super.viewDidLoad() | |
| collectionView.transform = CGAffineTransform.reversed | |
| // ......... | |
| } | |
| } |
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