I think one could import memchr() to nim and do the same as in the C version.
Besides that there is the naive implementation:
proc translate(c: char): char =
const
a = "abc"
b = "123"
let o = a.find(c)
if o >= 0:
return b[o]
else:
return c
echo translate('a')
echo translate('x')
[Run It](https://glot.io/snippets/ej02bwj2nl) Beware of UTF-8 thought. Your example and system.find() only works if the encoding translates every letter to one char.
