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| var IDX=256, HEX=[];
| while (IDX--) HEX[IDX] = (IDX + 256).toString(16).substring(1);
|
| module.exports = function (len) {
| len = len || 16;
| var str='', num=0;
| return function () {
| if (!str || num === 256) {
| str=''; num=(1+len)/2 | 0;
| while (num--) str += HEX[256 * Math.random() | 0];
| str = str.substring(num=0, len-2);
| }
| return str + HEX[num++];
| };
| }
|
|
