[vidarh]

If you anticipate that need, you just store the gradient as an array of strings, and you still then only need a trivial lookup.

[e12e]

I was more commenting on the language design here; the idea of indexing into a UTF-8 string and returning an ASCII character. What does the index count? Bytes? There doesn't seem to be a way to get UTF-8 characters from strings?

Ed: There seems to be an UTF-8 library:

https://github.com/jordanhubbard/nanolang/tree/main/modules/...