tentone.escher.js/source/math/UUID.js

"use strict";

/**
 * Implements all UUID related methods.
 *
 * @class
 */
function UUID(){}

/**
 * Generate new random UUID v4 as string.
 *
 * http://stackoverflow.com/questions/105034/how-to-create-a-guid-uuid-in-javascript/21963136#21963136
 */
UUID.generate = (function ()
{
	var lut = [];

	for(var i = 0; i < 256; i++)
	{
		lut[i] = (i < 16 ? "0" : "") + (i).toString(16);
	}

	return function generateUUID()
	{
		var d0 = Math.random() * 0xffffffff | 0;
		var d1 = Math.random() * 0xffffffff | 0;
		var d2 = Math.random() * 0xffffffff | 0;
		var d3 = Math.random() * 0xffffffff | 0;
		var uuid = lut[ d0 & 0xff ] + lut[ d0 >> 8 & 0xff ] + lut[ d0 >> 16 & 0xff ] + lut[ d0 >> 24 & 0xff ] + "-" +
			lut[ d1 & 0xff ] + lut[ d1 >> 8 & 0xff ] + "-" + lut[ d1 >> 16 & 0x0f | 0x40 ] + lut[ d1 >> 24 & 0xff ] + "-" +
			lut[ d2 & 0x3f | 0x80 ] + lut[ d2 >> 8 & 0xff ] + "-" + lut[ d2 >> 16 & 0xff ] + lut[ d2 >> 24 & 0xff ] +
			lut[ d3 & 0xff ] + lut[ d3 >> 8 & 0xff ] + lut[ d3 >> 16 & 0xff ] + lut[ d3 >> 24 & 0xff ];

		return uuid.toUpperCase();
	};

})();

//export {UUID};