Dmitry Lapshukov dmi3y

Put a closure on it

Sometimes you'll have objects that manage state along with event handling. This happens frequently in MVC apps. Let's start with a messy example:

var Launcher = function(rocket) {
  this.rocket = rocket
}

Launcher.prototype.isReady = function() {

Models	Examples
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git update-index --assume-unchanged dir-im-removing/
git update-index --assume-unchanged config/database.yml
git update-index --skip-worktree

git rebase -i <earliercommit>
git commit --amend --author="Author Name <email@address.com>"

	var flattenObject = function(ob) {
	var toReturn = {};

	for (var i in ob) {
	if (!ob.hasOwnProperty(i)) continue;

	if ((typeof ob[i]) == 'object') {
	var flatObject = flattenObject(ob[i]);
	for (var x in flatObject) {
	if (!flatObject.hasOwnProperty(x)) continue;

	YUI().use("singleton-class", function (Y) {
	var instance1 = new Y.SingletonClass(),
	instance2 = new Y.SingletonClass();

	Y.log(instance1 === instance2); // true!

	window.instance1 = instance1;

	});
	YUI().use("singleton-class", function (Y) {

	function maybe(value) {
	var obj = null;
	function isEmpty() { return value === undefined \|\| value === null }
	function nonEmpty() { return !isEmpty() }
	obj = {
	map: function (f) { return isEmpty() ? obj : maybe(f(value)) },
	getOrElse: function (n) { return isEmpty() ? n : value },
	isEmpty: isEmpty,
	nonEmpty: nonEmpty
	}

	// Lack of tail call optimization in JS
	var sum = function(x, y) {
	return y > 0 ? sum(x + 1, y - 1) :
	y < 0 ? sum(x - 1, y + 1) :
	x
	}

	sum(20, 100000) // => RangeError: Maximum call stack size exceeded

	// Using workaround

	YUI.add('multi', function (Y) {

	/**
	Loads different versions of YUI in sandboxed iframes and makes them available
	for use in the parent frame by exposing them as properties on a `Y.Multi`
	instance.

	This is primarily intended to be used for testing. You probably shouldn't use it
	for anything real.

	#!/bin/bash
	## ==================================
	## Servers
	## ==================================


	# A server with a non-standard SSH port, using passwordless RSA key authentication
	alias server1='ssh -p 2200 user@server-domain.com'

	# A server that uses a certficate for authentication