JavaScript enumeration

gistfile1.js

var enumeration = function(initial) {
	var _val = initial;
	
	return {
		get value() {
			return (_val++);
		}
	};
};

var e1 = enumeration(0);

console.log(e1.value);
console.log(e1.value);

var e2 = e1;
console.log(e2.value);

e2 = enumeration(5);
console.log(e2.value);

Output

0
1
2
5