pablogm

//
//  NSThread+blocks.swift
//  Swift extensions
//

import Foundation

public typealias Block = @convention(block) () -> Void

extension NSThread {

mohamede1945

//
//  ProgrammerAssertions.swift
//  Assertions
//
//  Created by Mohamed Afifi on 12/20/15.
//  Copyright © 2015 mohamede1945. All rights reserved.
//

import Foundation

natecook1000

Greetings and salutations, NSHipsters!

As the year winds down, it's a tradition here at NSHipster to ask you, dear readers, to offer up your favorite tricks and tips from the past year as gifts to your fellow hipsters. With iOS 9, El Capitan, brand new watch- and tvOS's, and the open-sourcing of some minor Apple-related tech, there's bound to be lots to share.

Submit your favorite piece of Swift or @objc trivia, helpful hints, unexpected discoveries, useful workarounds, useless fascinations, or anything else you found cool this year. Just comment below!

If you need inspiration, try [the list from last year][2015], or [from the year before][2014], or [from the year before that][2013].

andymatuschak

A composable pattern for pure state machines with effects

State machines are everywhere in interactive systems, but they're rarely defined clearly and explicitly. Given some big blob of code including implicit state machines, which transitions are possible and under what conditions? What effects take place on what transitions?

There are existing design patterns for state machines, but all the patterns I've seen complect side effects with the structure of the state machine itself. Instances of these patterns are difficult to test without mocking, and they end up with more dependencies. Worse, the classic patterns compose poorly: hierarchical state machines are typically not straightforward extensions. The functional programming world has solutions, but they don't transpose neatly enough to be broadly usable in mainstream languages.

Here I present a composable pattern for pure state machiness with effects,

zwaldowski

//
//  Activity.swift
//
//  Created by Zachary Waldowski on 8/21/16.
//  Copyright © 2016 Zachary Waldowski. Licensed under MIT.
//

import os.activity

private final class LegacyActivityContext {

russbishop

// Paste me into a playground!

import Cocoa

//: # Basic Setup

protocol FancyProtocol {
    associatedtype Thing
    func holdPinkyUp(x: Thing)
}

steipete

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

import XCTest

ollieatkinson

/// This is a list of Hypertext Transfer Protocol (HTTP) response status codes. 
/// It includes codes from IETF internet standards, other IETF RFCs, other specifications, and some additional commonly used codes.
/// The first digit of the status code specifies one of five classes of response; an HTTP client must recognise these five classes at a minimum.
enum HTTPStatusCode: Int, Error {
    
    /// The response class representation of status codes, these get grouped by their first digit.
    enum ResponseType {
        
        /// - informational: This class of status code indicates a provisional response, consisting only of the Status-Line and optional headers, and is terminated by an empty line.
        case informational

ddunbar

New Build System Tricks

Command Line

alias xcbuild=$(xcode-select -p)/../SharedFrameworks/XCBuild.framework/Versions/A/Support/xcbuild
# THIS DOESNT WORK YET: xcbuild openIDEConsole  # … then switch to Xcode ➡️
xcbuild showSpecs
xcbuild build <foo.pif> [—target <target>]

sindresorhus

final class AssociatedObject<T: Any> {
	subscript(index: Any) -> T? {
		get {
			return objc_getAssociatedObject(index, Unmanaged.passUnretained(self).toOpaque()) as! T?
		} set {
			objc_setAssociatedObject(index, Unmanaged.passUnretained(self).toOpaque(), newValue, .OBJC_ASSOCIATION_RETAIN_NONATOMIC)
		}
	}
}