unique-number

unique-number

Generate a unique number.

Basically, a simple iterator/counter. Optionally, use timestamps.

After many generations—typically when your operations are complete—it'd be a good idea to run reset() to avoid going beyond Number.MAX_SAFE_INTEGER.

var UniqueNumber = require("unique-number");

var uniqueNumber = new UniqueNumber();

console.log( uniqueNumber.generate() ); //-> 0
console.log( uniqueNumber.generate() ); //-> 1

uniqueNumber.reset();

console.log( uniqueNumber.generate() ); //-> 0

Timestamps:

var uniqueNumber = new UniqueNumber(true);

console.log( uniqueNumber.generate() );     //-> 1430000000000
console.log( uniqueNumber.generate() );     //-> 1430000000001
console.log( uniqueNumber.generate() );     //-> 1430000000002

uniqueNumber.reset();

console.log( uniqueNumber.generate() );     //-> 1430000000000

setTimeout( function() {
	console.log( uniqueNumber.generate() ); //-> 1430000000100
}, 100);

Shortcut syntax:

var uniqueNumber = require("unique-number")();

When using timestamps, the value is simply iterated when multiple requests are made per millisecond.

Notice

This library does not attempt to go beyond its simple design. If you need something more elaborate, check out cuid, puid or shortid.