[FINoM]

Чисто из интереса, решил узнать, можно ли повесить событие на вызов функции. Как ни странно (для меня), это удалось.

(function(){
	window.callEvent = function(func, callback){
		var callNumber = 0;
		return function(){
			var args = [].slice.call(arguments);
			var result;
			try {
				result = func.apply(this, arguments);
				callNumber++;
			} catch (e) {
				callback(e, args, this, callNumber);
				throw e;
			}
			callback(result, args, this, callNumber);
			return result;				 
		}
	}
	
	var logSomething = function(something){
		console.log(something);
	}
	
	logSomething = callEvent(logSomething, function(result, args, self, callNumber){
		console.log('alertSomething has been called. \n\
			Result is ' + result + '. \n\
			Arguments are ' + args + '. \n\
			Self is ' + self + '. \n\
			Number of calls ' + callNumber + '. \n'
		);
	});
	
	Array.prototype.push = callEvent(Array.prototype.push, function(result, args, self, callNumber){
		console.log('Array.prototype.push has been called. \n\
			Result is ' + result + '. \n\
			Arguments are ' + args + '. \n\
			Self is ' + self);
	});
	
	logSomething('Fuck yeah!');
	logSomething('Fuck yeah!');
	logSomething('Fuck yeah!');
	logSomething('Fuck yeah!');
	logSomething('Fuck yeah!');
	
	var array = [1,2,3,4,5];
	array.push(6);
})();