Created
October 8, 2014 07:20
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/** | |
* Fast UUID generator, RFC4122 version 4 compliant. | |
* @author Jeff Ward (jcward.com). | |
* @license MIT license | |
* @link http://stackoverflow.com/questions/105034/how-to-create-a-guid-uuid-in-javascript/21963136#21963136 | |
**/ | |
var UUID = (function() { | |
var self = {}; | |
var lut = []; for (var i=0; i<256; i++) { lut[i] = (i<16?'0':'')+(i).toString(16); } | |
self.generate = function() { | |
var d0 = Math.random()*0xffffffff|0; | |
var d1 = Math.random()*0xffffffff|0; | |
var d2 = Math.random()*0xffffffff|0; | |
var d3 = Math.random()*0xffffffff|0; | |
return 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 self; | |
})(); |
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