time uid

Yet another unique id module, for use in distributed systems. Features and Requirements

• all uids from a given user must be in lexicographical order
• all uids from all concurrent users must be unique with a certain probability
• ability to change the uid length for nested groups

This module is for cases where a lighter UID can be used in sub-groups (project files, thread messages)

Example id1/id2: /cIWr5hA4peMq6/h0ApXe3hZ

For comparison, below are example of available alternatives:

• npm timer-uid, 20char, firebase, style
  • /-IWr5h0A4pe3h_mjpZq6/_IWr5h0A4pe3hMmjpZq6
• npm cuid
  • /c-h72gsb32-0000-udoc-l363eofy/c-h72gsb32-0000-udoc-l363eofy
• RFC-4122 style
  • /f81d4fae-7dec-11d0-a765-00a0c91e6bf6/f81d4fae-7dec-11d0-a765-00a0c91e6bf6

API

var TUID = require('tuid')
var tuid = TUID({users: 25, odds: 1e12, startDate: '2010-01-01'}),
    uid0 = tuid()

Options and Defaults

• chars = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz', character set
• startDate = '2016-01-01', the beginning of time
• tMin = 17, minimum time interval in ms (~= 1000/62)
• tMax = 29 * SECONDS_PER_YEAR * 1000, maximum time in ms (29 years ~= 62^5)
• length = 10 // default set at 4 char random
• users = 20, minimum concurrent users making simultaneous edits
• odds = 1e12 mininimum odds of a duplicate uid per second (1 in ...)

others modules on npm

• (+) cuid, c-h72gsb32-0000-udoc-l363eofy, 29char
• (+) puid, 4 sections and has 24 chars
• (+) timer-uid, 20char, 8time + 12rnd, same as firebase
• component-uid, random only
• gen-uid
• genuid, random only
• j-uid
• lite-id, random only
• micro-uid
• micro-uid, random base 62 uid
• nid, random only
• pure-uuid, RFC-4122
• random-bytes, random only
• random-id, random only
• rndm, random only
• scuid, ciuwr5ekh00044pe13ruhsmjpq6, 27char, random
• short-uid, generates IDs of increasing length
• short-uuid, ??
• simple-random-id, random only
• simple-uid, node-oly, 24-bytes of chaos, Base64
• smart-id, random only
• uid-safe, crypto
• uid-util
• uid, variable length, random only
• uid2
• uniqid, Unique Hexatridecimal ID generator (base16)
• unique-id-generator, Date.now, prefix, numbers only (base10)
• unique-id
• unique
• uuid-pure, ???
• uuid-token-generator, ???