JS - JavaScript Fire Once Pattern

fire-once.js

/*
  JavaScript Fire Once Pattern
  
  Courtesy of David Walsh
  
  Reference Link: http://davidwalsh.name/javascript-once

*/

// The "once" wrapper
function once(fn, context) { 
	return function() { 
		if(!fn) return;
		fn.apply(context || this, arguments);
		// Set to null to allow garbage collection
		fn = null;
	};
}

// Usage
var canOnlyFireOnce = once(function() {
	console.log('Fired!');
});

canOnlyFireOnce(); // "Fired!"
canOnlyFireOnce(); // nada