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The Absolute Minimum Every Software Developer Must Know About Unicode in 2023 (Still No Excuses!) (tonsky.me)

submitted 2 years ago by [email protected] to c/[email protected]

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[–] [email protected] 0 points 2 years ago* (last edited 2 years ago) (1 children)

I love the comparison of string length of the same UTF-8 string in four programming languages (only the last one is correct, by the way):

Python 3:

len("🤦🏼‍♂️")

5

JavaScript / Java / C#:

"🤦🏼‍♂️".length

7

Rust:

println!("{}", "🤦🏼‍♂️".len());

17

Swift:

print("🤦🏼‍♂️".count)

1

[–] [email protected] 1 points 2 years ago* (last edited 2 years ago)

That depends on your definition of correct lmao. Rust explicitly counts utf-8 scalar values, because that's the length of the raw bytes contained in the string. There are many times where that value is more useful than the grapheme count.