Custom Base-62 Encoder

This repository contains the version of my encoder/decoder for Base-62 in two languages:

• Golang;
• TypeScript.

The latter could be downloaded from its NPM repo: https://www.npmjs.com/package/base62-ts.

I needed an efficient way to apply a Base-62 encoding/decoding algorithm working the same way in TypeScript/Javascript and in Golang environments.

WARNING: Decoding any wrongful string returns an error and 0. You shouldn't use the latter.

Both versions use the same following dictionary:

In other words, they use the following base: 0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ.

For TypeScript:

npm i base62-ts

import * as base62 from 'base62-ts'

const value = 18969

const encoded = base62.encode(value)

// 4VX
console.log(encoded)

const decoded = base62.decode(encoded)

console.assert(value === decoded)

For Go:

go get github.com/cyrildever/base62

import "github.com/cyrildever/base62"

value := "4VX"

decoded, err := base62.Decode(value)

// 18969
fmt.Println(decoded)

encoded, err := base62.Encode(decoded)

assert.Equal(t, value, encoded)

Both versions are available under a MIT license (see LICENSE).