JavaScript/Notes/Singleton: Difference between revisions
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[http://jsbin.com/ErAHEFo/1/edit jsbin] | [http://jsbin.com/ErAHEFo/1/edit jsbin] | ||
Example: [APE Animation Manager http://garretts.github.io/ape-javascript-library/build/anim/Animation.js] |
Revision as of 09:25, 23 November 2013
Singleton with information hiding.
Lazy Initialization
<source lang="javascript"> function getAnObject(a) {
var anObject;
var b = a + 1;
return (getAnObject = function() { if(! anObject ) { anObject = {name: b}; } return anObject; })();
} </source>
Eager Initialization
Not a Singleton, but a constructor. <source lang="javascript"> // Not a Singleton. var c = function(a) {
var b = a + 2; this.name = b;
};
var anObject = new c(); </source> Example: Constructors and prototype inheritance. jsbin
Singleton: <source lang="javascript"> var anObject = new function(a) {
var b = a + 2; this.name = b;
}(3); </source> jsbin
Example: [APE Animation Manager http://garretts.github.io/ape-javascript-library/build/anim/Animation.js]