object temp cacher

function cache(size, duration) {
 // an object cache, where you can set max size or time or both, and it maintains shit for you, and quickly too
	var index = {}, stack = [],
		count = 0;

	size = size || 100;
	duration = duration || 1000 * 60 * 5;

	function add(key, val) {
		count++;
		if(count > size) {
			var old = stack.shift().key;
			delete index[old];
			count--;
		}

		index[key] = stack.length;
		stack.push({
			key: key,
			value: val,
			date: Date.now() + duration
		});
		return val;
	}


	function rem(key) {
		var i = index[key];
		if(i === undefined) return false;
		count--;
		stack.splice(i, 1);
		delete index[key];
		return true;
	}

	function get(key) {
		var o = stack[index[key]] || 0;
		return o.value;
	}


	function mon() {
		var now = Date.now();
		stack.every(function(entry) {
			if(entry.date < now) return rem(entry.key);
		});
	}

	setInterval(mon, duration / 2);

	return { 
		add: add,
		rem: rem,
		get: get
	};
}