rnapier

import Foundation

typealias ObserverRemover = () -> Void

/*! An observable value
 
 An `Observable` wraps any value. If you add an observer handler, then every time the value is set, your handler will be
 called with the new value. Adding an observer returns a closure that is used to remove the observer. Note that the handler
 is called every time the value is set, even if this does not change the value. If you only want the handler to be called
 when the value changes, see `CoalescingObservable`.

AliSoftware

struct Coordinator {
  let window: UIWindow
  let navCtrl: UINavigationController?
  
  func start() {
    presentWelcomeScreen()
  }
  
  private func presentWelcomeScreen() {
    let vc = WelcomeScreenViewController() // Instanciate from code, XIB, Storyboard, whatever your jam is

rnapier

// Totally untested version of https://github.com/rnapier/RNTimer

import Foundation

final class RepeatingTimer {
    var block: () -> Void
    let source: dispatch_source_t

    init(timeInterval: NSTimeInterval, block: () -> Void) {
        assert(timeInterval != 0)

carlhunterroach

extension String {
    /// Truncates the string to length number of characters and 
    /// appends optional trailing string if longer
    func truncate(length: Int, trailing: String = "…") -> String {
        if self.characters.count > length {
            return self.substringToIndex(self.startIndex.advancedBy(length)) + trailing
        } else {
            return self
        }
    }

jesskturner

extension String {
    /// Truncates the string to length number of characters and 
    /// appends optional trailing string if longer
    func truncate(length: Int, trailing: String? = nil) -> String {
        if self.characters.count > length {
            return self.substringToIndex(self.startIndex.advancedBy(length)) + (trailing ?? "")
        } else {
            return self
        }
    }

jverkoey

/** The returned generator will enumerate each value of the provided tuple. */
func generatorForTuple(tuple: Any) -> AnyGenerator<Any> {  
  return anyGenerator(Mirror(reflecting: tuple).children.lazy.map { $0.value }.generate())
}

// Blogged at http://design.featherless.software/enumerating-tuple-values-swift/

phynet

Update

I've moved this gist to https://github.com/phynet/iOS-Schemes please check it there ;)

natecook1000

// (c) 2015 Nate Cook, licensed under the MIT license
//
// Fisher-Yates shuffle as protocol extensions

extension CollectionType {
    /// Return a copy of `self` with its elements shuffled
    func shuffle() -> [Generator.Element] {
        var list = Array(self)
        list.shuffleInPlace()
        return list

twostraws

//
//  SimpleScrollingStack.swift
//  A super-simple demo of a scrolling UIStackView in iOS 9
//
//  Created by Paul Hudson on 10/06/2015.
//  Learn Swift at www.hackingwithswift.com
//  @twostraws
//

import UIKit

craiggrummitt

//
//  SKMultilineLabel.swift
//
//  Created by Craig on 10/04/2015.
//  Copyright (c) 2015 Interactive Coconut.
//  MIT License, http://www.opensource.org/licenses/mit-license.php
//
/*   USE:
 (most component parameters have defaults)
 let multiLabel = SKMultilineLabel(text: "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.", labelWidth: 250, pos: CGPoint(x: size.width / 2, y: size.height / 2))