Create imoment, an immutable version of moment.js.

imoment

;(function() {

	var moment = this.moment;

	var IMoment = function(m) {
		this._m = m;
	};

	var m = moment();

	var mproto = Object.getPrototypeOf(m);

	for (var name in mproto) {
		(function(name) {
			var fn = m[name];
			IMoment.prototype[name] = function () {
				var m = this._m;
				if (arguments.length > 0 || (name == 'utc' || name == 'local'))
					m = m.clone();
				var args = [];
				for (var i = 0; i < arguments.length; i++) {
					var arg = arguments[i];
					if (arg instanceof IMoment)
						args.push(arg._m);
					else
						args.push(arg);
				}
				var r = fn.apply(m, args);
				if (moment.isMoment(r))
					return new IMoment(r);
				else
					return r;
			}
		})(name);
	}

	this.imoment = function() {
		return new IMoment(moment(arguments));
	};
})(this);