AnselmeKotchap

// Create CustomView.xib, set File's Owner to CustomView. 
// Link the top level view in the XIB to the contentView outlet.

class CustomView : UIView {
    @IBOutlet private var contentView:UIView?
    // other outlets
    
    override init(frame: CGRect) { // for using CustomView in code
        super.init(frame: frame)
        self.commonInit()

AnselmeKotchap

Setup Godaddy Domain for GitHub Page

1. Create a new file CNAME and put the domain.com in the file.
2. Login GoDaddy > Manage domain > DNS Zone File.
3. Under A (Host) change @ point to 192.30.252.153.
4. Under CName (Alias) change www point to website.github.io.

see also GitHub Pages + GoDaddy

AnselmeKotchap

Transforming Code into Beautiful, Idiomatic Python

Notes from Raymond Hettinger's talk at pycon US 2013 video, slides.

The code examples and direct quotes are all from Raymond's talk. I've reproduced them here for my own edification and the hopes that others will find them as handy as I have!

Looping over a range of numbers

for i in [0, 1, 2, 3, 4, 5]:

AnselmeKotchap

//shake animation: http://stackoverflow.com/questions/27987048/shake-animation-for-uitextfield-uiview-in-swift
public extension UIView {

    func shake(count : Float? = nil,for duration : TimeInterval? = nil,withTanslation translation : Float? = nil) {
    let animation : CABasicAnimation = CABasicAnimation(keyPath: "transform.translation.x")
    animation.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionLinear)

    animation.repeatCount = count ?? 2
    animation.duration = (duration ?? 0.5)/TimeInterval(animation.repeatCount)
    animation.autoreverses = true

AnselmeKotchap

// so it won't compile on a lower version.
extension UIAlertController {
    
    func show() {
        present(animated: true, completion: nil)
    }
    
    func present(animated animated: Bool, completion: (() -> Void)?) {
        if let rootVC = UIApplication.sharedApplication().keyWindow?.rootViewController {
            presentFromController(rootVC, animated: animated, completion: completion)

AnselmeKotchap

extension UIViewController {
    public var isVisible: Bool {
        if isViewLoaded() {
            return view.window != nil
        }
        return false
    }

    public var isTopViewController: Bool {
        if self.navigationController != nil {

AnselmeKotchap

extension UIDevice {
    var iPhone: Bool {
        return UIDevice().userInterfaceIdiom == .Phone
    }
    enum ScreenType: String {
        case iPhone4
        case iPhone5
        case iPhone6
        case iPhone6Plus
        case Unknown

AnselmeKotchap

import Foundation

class Timer {
  var timer = NSTimer()
  var handler: (Int) -> ()
  
  let duration: Int
  var elapsedTime: Int = 0
  
  init(duration: Int, handler: (Int) -> ()) {

AnselmeKotchap

//While I'm not sure the details of your implementation, I'd probably recommend storing the start time as an NSDate(), 
//then instead of incrementing/decrementing from an Integer/Float/Double, you can just calculate the time since the initial
//date, then remove that amount of time from your totalTime. That way when the app reopens, the time calculation is always 
//correct. The calculation for determining how long ago an NSDate() is so light that it'll be nearly instantaneous.

import UIKit

class Timer {
    private var startTime: NSDate? // Recorded when the user starts the timer.
    private var totalTime: Double = 0.0 // If you're counting down, this is the total time designated by the user (e.g. 20 mins)

AnselmeKotchap

//2 functions to pause and resume animation, I take from here and convert to Swift.

func pauseLayer(layer: CALayer) {
    let pausedTime: CFTimeInterval = layer.convertTime(CACurrentMediaTime(), fromLayer: nil)
    layer.speed = 0.0
    layer.timeOffset = pausedTime
}

func resumeLayer(layer: CALayer) {
    let pausedTime: CFTimeInterval = layer.timeOffset