JavaScript/Notes/Singleton
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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