Normalize Unicode strings in Rust by adding the unicode-normalization crate and calling the nfc() method on your string.
Use the unicode-normalization crate to convert strings into a standard form like NFC or NFD. Add the dependency to your Cargo.toml and call normalize on your string.
[dependencies]
unicode-normalization = "0.1"
use unicode_normalization::UnicodeNormalization;
let s = "café";
let normalized = s.nfc().collect::<String>();
Unicode normalization ensures that different ways of writing the same character are treated as identical. It matters when comparing text or storing data to avoid duplicates caused by hidden formatting differences. Think of it like standardizing how you write a name so "Café" and "Cafe\u0301" are recognized as the same thing.