this post was submitted on 02 Oct 2023
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Programming
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The problem is when you think you know stuff, but you don't. I knew that counting bytes doesn't work, but thought the number of codepoints was what I want. And then knowing that Rust uses UTF-8 internally, it's logical that
.chars().count()gives the number of codepoints. No need to read documentation, if you're so smart. ๐It does give you the correct length in quite a lot of cases, too. Even the byte length looks correct for ASCII characters.
So, yeah, this would require a lot more consideration whether it's worth it, but I'm mostly thinking there'd be no
.len()on the String type itself, and instead to get the byte count, you'd have to do.as_bytes().len().