inthash

Integer Hashing Library based on Knuth’s multiplicative hashing method for Javascript(& Typescript).

Installation

Node.js

npm install inthash

import { Hasher } from "inthash";

//

Deno

import { Hasher } from "https://deno.land/x/inthash/mod.ts";

//

Usage

3 values are required before using inthash.

1. Prime
2. Inverse
3. Xor (Random Number)

Fortunately, we provide the CLI tool also.

$ npx inthash

Prime   : 1288792847
Inverse : 327558127
Xor     : 74691595

$ npx inthash | pbcopy

then paste to your code! :-) good luck.

require('inthash').create(1288792847, 327558127, 74691595)

Copy the output code and paste it into your project.

There are only two methods. encode and decode.

const hasher = new Hasher({
  bits: 53, // Javascript, Number.MAX_SAFE_INTEGER
  prime: "6456111708547433",
  inverse: "3688000043513561",
  xor: "969402349590075",
});

const encoded = hasher.encode(100); // 6432533451586367
const decoded = hasher.decode(encoded); // 100

Done!

MySQL bigint(20)

:-)

Refs.

• https://github.com/jenssegers/optimus