lattner

Swift Concurrency Manifesto

Author: Chris Lattner

Chinese Translation by Jason Yu

Contents

• Introduction
• Overall Vision

ole

#!/bin/zsh

# Test if the Swift compiler knows about a particular language feature.
#
# Usage:
#
#     swift-has-feature [--swift SWIFT_PATH] FEATURE
#
# The exit code signals success (= the compiler knows this feature) or failure.
#

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

Async/Await for Swift

• Proposal: SE-XXXX
• Authors: Chris Lattner, Joe Groff

Introduction

Modern Cocoa development involves a lot of asynchronous programming using closures and completion handlers, but these APIs are hard to use. This gets particularly problematic when many asynchronous operations are used, error handling is required, or control flow between asynchronous calls gets complicated. This proposal describes a language extension to make this a lot more natural and less error prone.

This paper introduces a first class Coroutine model to Swift. Functions can opt into to being async, allowing the programmer to compose complex logic involving asynchronous operations, leaving the compiler in charge of producing the necessary closures and state machines to implement that logic.

chockenberry

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
	<key>NSPrivacyAccessedAPITypes</key>
	<array>
		<dict>
			<key>NSPrivacyAccessedAPITypeReasons</key>
			<array>
				<string>CA92.1</string>

ethanhuang13

//
//  FacebookAuth.swift
//  GitHub: ethanhuang13
//  Twitter: @ethanhuang13

import AuthenticationServices
import SafariServices

/*
 Updated: 

Sherlouk

//
// DebugDevice.swift
//
// Copyright 2022 • Sidetrack Tech Limited
//

import Foundation

// This must be called on the main-thread.
var isDebugProfileInstalled: Bool {

diamantidis

activate application "SF Symbols"

tell application "System Events"
    tell process "SF Symbols"

        -- Click the “list” radio button.
        click radio button 2 of radio group 1 of group 3 of toolbar 1 of window 0

        tell outline 1 of scroll area 1 of splitter group 1 of window 0
            select (row 1 where value of static text 1 of UI element 1 starts with "All")

JunyuKuang

let overrideCatalystScaleFactor: Void = {
    guard let sceneViewClass = NSClassFromString("UINSSceneView") as? NSObject.Type else {
        return
    }
    if sceneViewClass.instancesRespond(to: NSSelectorFromString("scaleFactor")) {
        // old
        swizzleInstanceMethod(
            class: sceneViewClass,
            originalSelector: NSSelectorFromString("scaleFactor"),
            swizzledSelector: #selector(swizzle_scaleFactor)

steipete

//
//  SpinlockTestTests.swift
//  SpinlockTestTests
//
//  Created by Peter Steinberger on 04/10/2016.
//  Copyright © 2016 PSPDFKit GmbH. All rights reserved.
//

import XCTest