Jesse Squires jessesquires

ANNOUNCEMENT

I have moved this over to the Tech Interview Cheat Sheet Repo and has been expanded and even has code challenges you can run and practice against!

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There was [a tweet][tweetSoto] a couple of days ago that resulted in a discussion/question about what it wrong with the usage of removedOnCompletion = NO in the [SparkRecordingCircle code][code] for that [Subjective-C post][post].

We all kept saying that the explanation doesn't fit in a tweet, so here is my rough explanation about the issues.

But, let me first say that I think that the Subjective-C articles are reallt cool and useful to learn from. This is trying to reason about the general usage of removedOnCompletion = NO, using that code as an example, since that was what was discussed on twitter.

The root problem, as [Nacho Soto pointed out][rootProblem], is that removedOnCompletion = NO in combination with fillMode = kCAFillModeForwards is almost always used when you are not updating the model layer. This means that after the animation has finished, what you see on screen is not reflected in the property of the layer. The biggest issue that this can cause is that all the

rage-quit support for bash

HOW TO INSTALL

Put flip somewhere in your $PATH and chmod a+x it.

Copy fuck into ~/.bashrc.

	class Regex {
	let pattern: String
	let options: NSRegularExpressionOptions!

	private var matcher: NSRegularExpression {
	return NSRegularExpression(pattern: self.pattern, options: nil, error: nil)
	}

	required init(pattern: String, options: NSRegularExpressionOptions = nil) {
	self.pattern = pattern

	import Foundation

	protocol SomeDelegateProtocol : class {
	func firstFunc() -> String
	func secondFunc() -> Bool
	func thirdFunc() -> Self
	}

	class MyClass {
	weak var delegate : SomeDelegateProtocol?

	//
	// JAZMusician.h
	// JazzyApp
	//

	#import <Foundation/Foundation.h>

	/**
	JAZMusician models, you guessed it... Jazz Musicians!
	From Ellington to Marsalis, this class has you covered.

	#!/bin/sh

	#ID='A16FF353-8441-459E-A50C-B071F53F51B7' # Xcode 6.2
	ID='992275C1-432A-4CF7-B659-D84ED6D42D3F' # Xcode 6.3

	PLIST_BUDDY=/usr/libexec/PlistBuddy

	function add_compatibility() {
	"$PLIST_BUDDY" -c "Add DVTPlugInCompatibilityUUIDs:10 string $2" \
	"$1/Contents/Info.plist"

	#ifndef NS_DESIGNATED_INITIALIZER
	#if __has_attribute(objc_designated_initializer)
	#define NS_DESIGNATED_INITIALIZER __attribute((objc_designated_initializer))
	#else
	#define NS_DESIGNATED_INITIALIZER
	#endif
	#endif

	<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
	<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
	<html xmlns:d="http://www.apple.com/DTDs/DictionaryService-1.0.rng">
	<head>
	<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
	</head>
	<body>
	<d:entry id="m_en_gb0035330" d:title="apple" class="entry">
	<span class="hg">
	<span d:dhw="1" role="text" linebreaks="apple" class="hw">apple</span>

	/**
	Provides the ability to verify key paths at compile time.

	If "keyPath" does not exist, a compile-time error will be generated.

	Example:
	// Verifies "isFinished" exists on "operation".
	NSString *key = SQKeyPath(operation, isFinished);

	// Verifies "isFinished" exists on self.