koingdev

/// Return a new function that will be called only once after `delay` time passed between invocation
func debounce(delay: TimeInterval, queue: DispatchQueue = .main, function: @escaping () -> Void) -> () -> Void {
	var currentWorkItem: DispatchWorkItem?
	return {
		currentWorkItem?.cancel()
		currentWorkItem = DispatchWorkItem { function() }
		queue.asyncAfter(deadline: .now() + delay, execute: currentWorkItem!)
	}
}

MaximBazarov

Prerequisites

1. Install brew
2. brew install ffmpeg ?? brew install ffmpeg imagemagick gifsicle pkg-config
3. brew cask install xquartz
4. brew install gifsicle

Conversion

nathantannar4

//
//  Reflectable.swift
//
//  Created by Nathan Tannar on 2018-12-04.
//

import Foundation

// Add this protocol to your `struct` or `class`
protocol Reflectable {

orta

IanKeen

protocol LayoutGuideProvider {
    var leadingAnchor: NSLayoutXAxisAnchor { get }
    var trailingAnchor: NSLayoutXAxisAnchor { get }
    var leftAnchor: NSLayoutXAxisAnchor { get }
    var rightAnchor: NSLayoutXAxisAnchor { get }
    var topAnchor: NSLayoutYAxisAnchor { get }
    var bottomAnchor: NSLayoutYAxisAnchor { get }
    var widthAnchor: NSLayoutDimension { get }
    var heightAnchor: NSLayoutDimension { get }
    var centerXAnchor: NSLayoutXAxisAnchor { get }

kfarst

//: Playground - noun: a place where people can play

import UIKit
import PlaygroundSupport

class Responder: NSObject {
    @objc func segmentedControlValueChanged(_ sender: UISegmentedControl) {
        UIView.animate(withDuration: 0.3) {
            buttonBar.frame.origin.x = (segmentedControl.frame.width / CGFloat(segmentedControl.numberOfSegments)) * CGFloat(segmentedControl.selectedSegmentIndex)
        }

lattner

Swift Concurrency Manifesto

Author: Chris Lattner

Chinese Translation by Jason Yu

Contents

• Introduction
• Overall Vision

calebd

//  Created by Caleb Davenport on 7/14/17.

import UIKit

final class ActionSheetPresentationController: UIPresentationController {

    // MARK: - Properties

    private var dimmingView: UIView!

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.

Sorix

//  Created by Vasily Ulianov on 09.02.17, updated in 2019.
//  License: MIT

import Foundation

/// Subclass of `Operation` that adds support of asynchronous operations.
/// 1. Call `super.main()` when override `main` method.
/// 2. When operation is finished or cancelled set `state = .finished` or `finish()`
open class AsynchronousOperation: Operation {
    public override var isAsynchronous: Bool {