source: trip-planner-front/node_modules/sockjs-client/lib/utils/random.js@ bdd6491

Last change on this file since bdd6491 was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

initial commit

  • Property mode set to 100644
File size: 721 bytes
Line 
1'use strict';
2
3var crypto = require('crypto');
4
5// This string has length 32, a power of 2, so the modulus doesn't introduce a
6// bias.
7var _randomStringChars = 'abcdefghijklmnopqrstuvwxyz012345';
8module.exports = {
9 string: function(length) {
10 var max = _randomStringChars.length;
11 var bytes = crypto.randomBytes(length);
12 var ret = [];
13 for (var i = 0; i < length; i++) {
14 ret.push(_randomStringChars.substr(bytes[i] % max, 1));
15 }
16 return ret.join('');
17 }
18
19, number: function(max) {
20 return Math.floor(Math.random() * max);
21 }
22
23, numberString: function(max) {
24 var t = ('' + (max - 1)).length;
25 var p = new Array(t + 1).join('0');
26 return (p + this.number(max)).slice(-t);
27 }
28};
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