aaac7fed
 liuqimichale
add
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'use strict';
/* global crypto:true */
var crypto = require('crypto');
// This string has length 32, a power of 2, so the modulus doesn't introduce a
// bias.
var _randomStringChars = 'abcdefghijklmnopqrstuvwxyz012345';
module.exports = {
string: function(length) {
var max = _randomStringChars.length;
var bytes = crypto.randomBytes(length);
var ret = [];
for (var i = 0; i < length; i++) {
ret.push(_randomStringChars.substr(bytes[i] % max, 1));
}
return ret.join('');
}
, number: function(max) {
return Math.floor(Math.random() * max);
}
, numberString: function(max) {
var t = ('' + (max - 1)).length;
var p = new Array(t + 1).join('0');
return (p + this.number(max)).slice(-t);
}
};
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