Javascript Debounce

debounce.js

/**
 * @author Boopathi
 * @description Debounce a function call.
 * @usage function(){}.debounce()
*/ 
Function.prototype.debounce = function(threshold, execAsap) {
	var func = this, timeout;
	return function debounced(){
		var obj= this, args = arguments;
		function delayed() {
			if(!execAsap)
				func.apply(obj,args);
			timeout = null;
		}
		if(timeout)
			clearTimeout(timeout);
		else if(execAsap)
			func.apply(obj,args);
		timeout = setTimeout(delayed, threshold || 100);
	}
}