16 lines
368 B
JavaScript
16 lines
368 B
JavaScript
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++];
|
|
};
|
|
}
|