JS - FIFO stack

Queue with FIFO

function uMemory() {
	var props = {
		'blocksLimit' : 5
	};
	var queue = [];
	var blocks = {};

	this.init = function (options) {
		props = $.extend(props, options);
		//console.dir(props);
	};

	this.save = function (page, data) {
		queue.unshift(page);
		blocks['p' + page] = data;
		return checkSizeLimit(page);
	}
	this.get = function (page) {
		var p = blocks['p' + page];
		return p ? p : false;
	}
	this.status = function() {
		/*console.log('Mem Queue ', queue);
		console.log('Mem Blocks ', blocks);*/
	}
	this.clear = function() { 
		queue = [];
		blocks = {};
	}
	var checkSizeLimit = function (page) {
		/*console.log('q length: ' + queue.length + ', limit: ' + props.blocksLimit);*/
		if ( queue.length > props.blocksLimit ) {
			var oldest = queue.pop();
			blocks['p' + oldest] = null;
			return true;
		}
		return false;
	}
}