this post was submitted on 23 Dec 2024
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Rust
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Such posts are more suitable as microblogs IMHO.
Anyway, string lengths are byte lengths, and indexing strings is actually not panic-safe. This is why we have (still-nightly) char-boundary methods now.
If you want to work on characters. use
.chars().count()
and.chars().nth()
.And character boundaries are themselves not always grapheme boundaries, which is also something that you might need to keep in mind when you start writing serious code.
With all that in mind, you should realize, for example, that probably every string reversing beginner exercise answer in every language is actually wrong. And the wrongness may actually start at the underspecified requirements ๐