hat

hat

Generate random IDs and avoid collisions.

examples

hat

var hat = require('hat');

var id = hat();
console.log(id);

output:

0c82a54f22f775a3ed8b97b2dea74036

rack

var hat = require('hat');
var rack = hat.rack();

console.log(rack());
console.log(rack());

output:

1c24171393dc5de04ffcb21f1182ab28
fabe2323acc1b559dee43d4a1e16cbeb

methods

var hat = require('hat');

hat(bits=128, base=16)

Generate a random ID string with bits of data in a base.

Leading zeros are appended such that all outputs for a given number of bits have equal length.

var rack = hat.rack(bits=128, base=16, expandBy)

Make a new hat rack. Call rack() repeatedly to generate new IDs which are checked for collisions.

If expandBy is specified, increment bits by this amount if too many collisions occur. If expandBy isn't specified, rack() will throw if too many collisions occur during generation.

Optionally call var id = rack(data) to store data at the new ID.

You can get the data out again with rack.get(id) and set the data with rack.set(id, value).