dan , 7 months ago

‘U’ and ‘u’ are two different symbols. And you have to make such rules for every language a part of your processing logic.

Unicode has standard rules for case folding, which includes the rules for all languages supported by Unicode. Case-insensitive comparisons in all good programming languages uses this data.

Note that you can’t simply convert both strings to uppercase or lowercase to compare them, as then you’ll run into the Turkish i problem: haacked.com/…/turkish-i-problem-and-why-you-shoul…