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One argument would be that you can apply functions to change their case. For example in Python >>> "Ᾰ̓ΡΕΤΉ".lower() 'ᾰ̓ρετή' >>> "AWESOME".lower() 'aw
by schoen 3y ago
One argument would be that you can apply functions to change their case.
For example in Python
>>> "Ᾰ̓ΡΕΤΉ".lower()
'ᾰ̓ρετή'
>>> "AWESOME".lower()
'awesome'
The Greek Α has lowercase form α, whereas the Roman A has lowercase form a.
Another argument would be that you want a distinct encoding in order to be able to sort properly. Suppose we used the same codepoint (U+0050) for everything that looked like P. Then Greek Ρόδος would sort before Greek Δήλος because Roman P is numerically prior to Greek Δ in Unicode, even though Ρ comes later than Δ in the Greek alphabet.
- mmoskal 3y agoApparently this works very well, except for a single letter, Turkish I. Turkish has two version of 'i' and Unicode folks decided to use the Latin 'i' for lowercase dotted i, and Latin 'I' for uppercase dot-less I (and have two new code points for upper-case dotted I and lower-case dot-less I). Now, 'I'.lower() depends on your locale. A cause for a number of security exploits and lots of pain in regular expression engines. edit: Well, apparently 'I'.lower() doesn't depend on locale (so it's incorrect for Turkish languages); in JS you have to do 'I'.toLocaleLowerCase('tr-TR'). Regexps don't support it in neither.