Custom Base-62 Encoder
This repository contains the version of my encoder/decoder for Base-62 in two languages:
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:
| Value | Character | Value | Character | Value | Character | Value | Character | Value | Character |
|---|---|---|---|---|---|---|---|---|---|
| 0 | 0 |
13 | d |
26 | q |
39 | D |
52 | Q |
| 1 | 1 |
14 | e |
27 | r |
40 | E |
53 | R |
| 2 | 2 |
15 | f |
28 | s |
41 | F |
54 | S |
| 3 | 3 |
16 | g |
29 | t |
42 | G |
55 | T |
| 4 | 4 |
17 | h |
30 | u |
43 | H |
56 | U |
| 5 | 5 |
18 | i |
31 | v |
44 | I |
57 | V |
| 6 | 6 |
19 | j |
32 | w |
45 | J |
58 | W |
| 7 | 7 |
20 | k |
33 | x |
46 | K |
59 | X |
| 8 | 8 |
21 | l |
34 | y |
47 | L |
60 | Y |
| 9 | 9 |
22 | m |
35 | z |
48 | M |
61 | Z |
| 10 | a |
23 | n |
36 | A |
49 | N |
||
| 11 | b |
24 | o |
37 | B |
50 | O |
||
| 12 | c |
25 | p |
38 | C |
51 | P |
In other words, they use the following base: 0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ.
For TypeScript:
npm i base62-tsimport * 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/base62import "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).
© 2021-2024 Cyril Dever. All rights reserved