Question

78

Generate Random 32 Bit Number in Node

rated 0 times [ 85] [ 7] / answers: 1 / hits: 8426 / 10 Years ago, wed, january 21, 2015, 12:00:00

What is the best way to generate a 32 bit random unsigned number in Node? Here is what I tried:

var max32 = Math.pow(2, 32) - 1

var session = Math.floor(Math.random() * max32);

I need this for a unique id.

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jocelynkarsynr

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answered 10 Years ago maximusbradforde · Accepted Answer

You could use crypto.randomBytes() like:

var crypto = require('crypto');

function randU32Sync() {

  return crypto.randomBytes(4).readUInt32BE(0, true);

}

// or

function randU32(cb) {

  return crypto.randomBytes(4, function(err, buf) {

    if (err) return cb(err);

    cb(null, buf.readUInt32BE(0, true));

  }

}