sergdort

@available(iOS 15.0, *)
struct TaskPublisher<Output>: Publisher{
  typealias Failure = Never

  let work: () async -> Output

  init(work: @escaping () async -> Output) {
    self.work = work
  }

atimca

Question set for interviews

Developer

Tech
- [ ] How many projects do you have
- [ ] Which architectures approaches do you use
- [ ] Which swift version / legacy objc, c what are you going to do with it.
- [ ] Do you do layout in xibs or in code?
- [ ] What do you think about reactive programming (RxSwift)

mariia-cherniuk

import SwiftUI

@available(iOS 13.0, *)
public struct IfLetElseView<Value, IfContent: View, ElseContent: View>: View {
    private let value: Value?
    private let ifContent: (Value) -> IfContent
    private let elseContent: () -> ElseContent
    
    public init(_ value: Value?,
                @ViewBuilder ifContent: @escaping (Value) -> IfContent,

jegnux

@propertyWrapper
public struct AnyProxy<EnclosingSelf, Value> {
    private let keyPath: ReferenceWritableKeyPath<EnclosingSelf, Value>

    public init(_ keyPath: ReferenceWritableKeyPath<EnclosingSelf, Value>) {
        self.keyPath = keyPath
    }

    @available(*, unavailable, message: "The wrapped value must be accessed from the enclosing instance property.")
    public var wrappedValue: Value {

mluisbrown

-- Sets your audio input source to "Internal Microphone"
-- Frequently needed if you use bluetooth headpohones and
-- run the Xcode iOS simulator, which will often set your
-- headphones to be the input device, resulting in a drastic
-- decrease in sound quality, and making it mono 

tell application "System Preferences" to activate
tell application "System Preferences"
    reveal anchor "input" of pane id "com.apple.preference.sound"
end tell

tclementdev

libdispatch efficiency tips

The libdispatch is one of the most misused API due to the way it was presented to us when it was introduced and for many years after that, and due to the confusing documentation and API. This page is a compilation of important things to know if you're going to use this library. Many references are available at the end of this document pointing to comments from Apple's very own libdispatch maintainer (Pierre Habouzit).

My take-aways are:

• You should create very few, long-lived, well-defined queues. These queues should be seen as execution contexts in your program (gui, background work, ...) that benefit from executing in parallel. An important thing to note is that if these queues are all active at once, you will get as many threads running. In most apps, you probably do not need to create more than 3 or 4 queues.

• Go serial first, and as you find performance bottle necks, measure why, and if concurrency helps, apply with care, always validating under system pressure. Reuse

lattner

Swift Concurrency Manifesto

Author: Chris Lattner

Chinese Translation by Jason Yu

Contents

• Introduction
• Overall Vision

maciekish

#!/bin/bash
killall Xcode
xcrun -k
xcodebuild -alltargets clean
rm -rf "$(getconf DARWIN_USER_CACHE_DIR)/org.llvm.clang/ModuleCache"
rm -rf "$(getconf DARWIN_USER_CACHE_DIR)/org.llvm.clang.$(whoami)/ModuleCache"
rm -rf ~/Library/Developer/Xcode/DerivedData/*
rm -rf ~/Library/Caches/com.apple.dt.Xcode/*
open /Applications/Xcode.app