aguid
A Globally Unique IDentifier (GUID) generator in JS.!Node.js Versionnode-version-imagenode-version-url !NPM Versionnpm-imagenpm-url
Why?
There are already great node module(s) for generating random UUIDs: https://www.npmjs.com/search?q=uuidWhat we need is a way to return the same UUID/GUID for a given input string; i.e. Deterministic !
Use Case
The use-case is very specific: generate a key for a record in a database.Imagine you want to store a person's personal details in a record but don't want use a username or email as the key for the record. We solved this by creating a UUID (string) from the username or email address and using that instead. (see usage below)
Usage
Install
npm install aguid --saveGenerate a Deterministic GUID given an input
var aguid = require('aguid');
var guid = aguid("hello@world.io"); // d828ed52-32ed-4908-86df-df934d3c315d (ALWAYS)
// use the guid as the key for our record in Redis, ElasticSearch, Postgres, etc.Note: even though the GUID we are returning for a given input is deterministic, it's still globally unique because we are using SHA256 hash for the characters. and in our specific use-case we are hashing an email address (which is its' self unique be definition!)
Generate a Random GUID when invoked without argument
var aguid = require('aguid');
var guid = aguid(); // 525be54a-1101-46bf-97d7-2e9c89dd1b16 (*Random*)
// use for what ever you need a *random* guidResearch
Background
- Wikipedia UUID (gentler intro):
- Universally Unique IDentifier (UUID) Specification:
- V.4 Random UUID:
Implementation
- Hex to Base64 and back:
- Snowflake approach:
- GUIDs using Math.random() https://gist.github.com/jed/982883
