Simple base62 encoder/decoder in Racket Scheme
Base62 encoding converts numbers to ASCII strings (0-9, a-z and A-Z) and vice versa, which typically results in comparatively short strings. Such identifiers also tend to more readily identifiable by humans.
999≙"g7"9999≙"2Bh"238327≙"ZZZ"
#lang racket
(require "base62.rkt")
(base62-encode 100) ; "1C"
(base62-decode "1C") ; 100
(base62-encode "!") ; Throws
(base62-decode 1) ; ThrowsMIT License © 2018 Theo Despoudis