steipete

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    self.window = [[UIWindow alloc] initWithFrame:UIScreen.mainScreen.bounds];
    self.window.backgroundColor = [UIColor whiteColor];
    UIViewController *controller = [UIViewController new];
    controller.title = @"Testing...";
    self.rootViewController = [[UINavigationController alloc] initWithRootViewController:controller];
    self.window.rootViewController = self.rootViewController;
    [self.window makeKeyAndVisible];

    // Use Aspects to hook into XCTestCase to get better feedback than just the log.

jhaberstro

protocol Num {
  class func zero() -> Self
  func succ() -> Self
  func add(y: Self) -> Self
  func multiply(y: Self) -> Self
}

extension Int32: Num {
  static func zero() -> Int32 { return 0 }
  func succ() -> Int32 { return self + 1 }

evancz

Architecture in Elm

This document is a collection of concepts and strategies to make large Elm projects modular and extensible.

We will start by thinking about the structure of signals in our program. Broadly speaking, your application state should live in one big foldp. You will probably merge a bunch of input signals into a single stream of updates. This sounds a bit crazy at first, but it is in the same ballpark as Om or Facebook's Flux. There are a couple major benefits to having a centralized home for your application state:

1. There is a single source of truth. Traditional approaches force you to write a decent amount of custom and error prone code to synchronize state between many different stateful components. (The state of this widget needs to be synced with the application state, which needs to be synced with some other widget, etc.) By placing all of your state in one location, you eliminate an entire class of bugs in which two components get into inconsistent states. We also think yo

andymatuschak

//
//  CollectionViewDataSource.swift
//  Khan Academy
//
//  Created by Andy Matuschak on 10/14/14.
//  Copyright (c) 2014 Khan Academy. All rights reserved.
//

import UIKit

jaredru

- (RACSignal *)shareWhileActive {
    NSRecursiveLock *lock = [[NSRecursiveLock alloc] init];
    lock.name = @"com.github.ReactiveCocoa.shareWhileActive";

    // These should only be used while `lock` is held.
    __block NSUInteger subscriberCount = 0;
    __block RACDisposable *underlyingDisposable = nil;
    __block RACReplaySubject *inflightSubscription = nil;

    return [[RACSignal

mattt

Season's Greetings, NSHipsters!

As the year winds down, and we take a moment to reflect on our experiences over the past months, one thing is clear: 2014 has been an incredible year professionally for Apple developers. So much has happened in such a short timespan, and yet it's hard to remember our relationship to Objective-C before Swift, or what APIs could have captivated our imagination as much as iOS 8 or WatchKit.

It's an NSHipster tradition to ask you, dear readers, to send in your favorite tips and tricks from the past year for publication over the New Year's holiday. This year, with the deluge of new developments—both from Cupertino and the community at large—there should be no shortage of interesting tidbits to share.

Submit your favorite piece of Swift or Objective-C trivia, framework arcana, hidden Xcode feature, or anything else you think is cool, and you could have it featured in the year-end blowout article. Just comment on this gist below!

If you're wondering about what to post, look to

steipete

-> <ViewController:0x79634cd0>: -[UIViewController presentViewController:<NavigationController: 0x7ba7dab0> animated:1 completion:(null)]
--> <ViewController:0x79634cd0>: -[UIViewController _transitionCoordinator]
---> <ViewController:0x79634cd0>: -[UIViewController _presentationController]
===> (null)
---> <ViewController:0x79634cd0>: -[UIViewController presentedViewController]
----> <ViewController:0x79634cd0>: -[UIViewController childModalViewController]
====> (null)
===> (null)
---> <ViewController:0x79634cd0>: -[UIViewController childModalViewController]
===> (null)

cdzombak

See this SO discussion.

radars

• 16744288, closed as a dupe of 14459641
• 15638008

solutions

• https://github.com/simonwhitaker/swmath — define new functions which utilize clang function overloading

airspeedswift

// ideally we would define this inside the tree struct
private class _Node<T: Comparable> {
    var _value: T
    var _left: _Node<T>? = nil
    var _right: _Node<T>? = nil
    
    init(value: T) { _value = value }
}

steipete

@interface PSPDFWindow ()
@property (nonatomic, strong) UIViewController *realRootViewController;
@end

@implementation PSPDFWindow

- (void)setHidden:(BOOL)hidden {
    [super setHidden:hidden];

    // Workaround for rdar://19592583