Brandon Ha brandonvanha

## checkSheet.js
Cheat Sheet: Working with Objects
This section is a quick reference with pointers to more thorough explanations.
• Object literals (see “Object Literals” on page 198):

  var jane = {
    name: 'Jane',
    'not an identifier': 123,
    describe: function () { // method
      return 'Person named '+this.name;
    },

## EfficientCodes.txt
• Apply the array method map() to a string:
> [].map.call('abc', function (x) { return x.toUpperCase() })
[ 'A', 'B', 'C' ]

Using map() generically is more efficient than using split(''), which creates an intermediate array:
> 'abc'.split('').map(function (x) { return x.toUpperCase() })
[ 'A', 'B', 'C' ]

Apply a string method to nonstrings. toUpperCase() converts the receiver to a string and uppercases the result:
> String.prototype.toUpperCase.call(true)

## settingAndGetting.js
// Via Object Literal
var obj = {

  get foo() {
    return 'getter';
  },

  set foo(value) {
    console.log('setter: ' + value);
  }

## changevalueinput.html
<html>
<head>
    <script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>

  	<script type="text/Javascript">
  		$(document).ready(function () {
  			$(function () {

  			    $('.add').on('click',function(){
  			        var $qty=$(this).closest('p').find('.qty');

## getAllPropertyNames.js
function getAllPropertyNames(obj) {
    var result = [];
    while (obj) {
        // Add the own property names of `obj` to `result`
        Array.prototype.push.apply(result, Object.getOwnPropertyNames(obj));
        obj = Object.getPrototypeOf(obj);
    }
    return result;
}
	Cheat Sheet: Working with Objects
	This section is a quick reference with pointers to more thorough explanations.
	• Object literals (see “Object Literals” on page 198):

	var jane = {
	name: 'Jane',
	'not an identifier': 123,
	describe: function () { // method
	return 'Person named '+this.name;
	},
	• Apply the array method map() to a string:
	> [].map.call('abc', function (x) { return x.toUpperCase() })
	[ 'A', 'B', 'C' ]

	Using map() generically is more efficient than using split(''), which creates an intermediate array:
	> 'abc'.split('').map(function (x) { return x.toUpperCase() })
	[ 'A', 'B', 'C' ]

	Apply a string method to nonstrings. toUpperCase() converts the receiver to a string and uppercases the result:
	> String.prototype.toUpperCase.call(true)
	// Via Object Literal
	var obj = {

	get foo() {
	return 'getter';
	},

	set foo(value) {
	console.log('setter: ' + value);
	}
	<html>
	<head>
	<script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>

	<script type="text/Javascript">
	$(document).ready(function () {
	$(function () {

	$('.add').on('click',function(){
	var $qty=$(this).closest('p').find('.qty');
	function getAllPropertyNames(obj) {
	var result = [];
	while (obj) {
	// Add the own property names of `obj` to `result`
	Array.prototype.push.apply(result, Object.getOwnPropertyNames(obj));
	obj = Object.getPrototypeOf(obj);
	}
	return result;
	}