Aimless testing

playground.js

var add = function (x) {
	var self = this;
	self.value = x;

	var fn = function (x) {
		self.value += x;
		return fn;
	};

	fn.valueOf = function () {
		return self.value;
	};

	setTimeout(function () {
		fn = null;
	}, 5000);

	return fn;
};

var x = add(2)(3);
console.log(x);

setTimeout(function () {
	console.log(x);
}, 6000);

// =====================

var f = function () {
	var ob = function () {
		return 1;
	};

	setTimeout(function () {
		ob = function () {
			return 2;
		};
	}, 1000);

	return ob;
};

var s = f();
console.log(s());
setTimeout(function () {
	console.log(s());
}, 3000);

// =====================

var h = function (x) {
	var self = this;
	self.value = 0;
	self.count = 0;

	function hn (x) {
		self.value += x;
		self.count ++;

		var stamp = self.count;
		setTimeout(function () {
			if (stamp == self.count) {
				console.log('Result = ' + self.value);
				hn = {};
			}
		}, 0);

		return hn;
	}

	hn.valueOf = function () {
		return self.value;
	};

	return hn.call(this, x);
};

var t = h(3)(4);