JavaScript/Notes/Singleton: Difference between revisions
Jump to navigation
Jump to search
Line 20: | Line 20: | ||
<source lang="javascript"> | <source lang="javascript"> | ||
// Not a Singleton. | // Not a Singleton. | ||
var | var c = function(a) { | ||
var b = a + 2; | var b = a + 2; | ||
this.name = b; | this.name = b; |
Revision as of 21:05, 22 November 2013
Singleton with information hiding.
Factory Method
<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
<source lang="javascript"> // Not a Singleton. var c = function(a) {
var b = a + 2; this.name = b;
};
var anObject = new c(); </source>
<source lang="javascript"> var anObject = new function(a) {
var b = a + 2; this.name = b;
}; </source>