// Fill in random data. At i==19 set the high bits of clock sequence as
// per rfc4122, sec. 4.1.5
for (i = 0; i < 36; i++) {
if (!uuid[i]) {
r = 0 | Math.random()*16;
uuid[i] = chars[(i == 19) ? (r & 0x3) | 0x8 : r];
}
}
}
return uuid.join('');
};
// A more performant, but slightly bulkier, RFC4122v4 solution. We boost performance
// by minimizing calls to random()
Math.uuidFast = function() {
var chars = CHARS, uuid = new Array(36), rnd=0, r;
for (var i = 0; i < 36; i++) {
if (i==8 || i==13 || i==18 || i==23) {
uuid[i] = '-';
} else if (i==14) {
uuid[i] = '4';
} else {
if (rnd <= 0x02) rnd = 0x2000000 + (Math.random()*0x1000000)|0;
r = rnd & 0xf;
rnd = rnd >> 4;
uuid[i] = chars[(i == 19) ? (r & 0x3) | 0x8 : r];
}
}
return uuid.join('');
};
// A more compact, but less performant, RFC4122v4 solution:
Math.uuidCompact = function() {
return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
var r = Math.random()*16|0, v = c == 'x' ? r : (r&0x3|0x8);
return v.toString(16);
});
};
})();