geastwood

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geastwood

Object Descriptor takeaways

A descriptor is an object which describe how the property behaves.

use object literal

Simplest way to define an object is by using object literal, by doing so, the created object are set with implicit descriptors to all "true". As illustrated below:

var objectLiteral = {
    name: 'foo'
};

geastwood

"hello".missing;    // log undefined
[][99];             // log undefined
{} + {};            // log NaN
[] + [];            // log "" (empty string)
[] + {};            // log "[object Object]"
{} + [];            // log 0

geastwood

// simple namespace function
// use: var newNs = namespace('this.is.a.new.namespace');

var namespace = function(namespace, context) {
  
  if (!namespace) { throw 'namespace string is required' };
  
  var ns = namespace.split('.');
  var current = context || this;
  

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window.singleton = (function(){
    
    var instance;
    
    var init = function() {
        return Math.random();
    };
    
    return {
        

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// use Object toString method to determine Array
var isArray = function(obj){
    return Object.prototype.toString.call(obj) === '[object Array]';
}