From: 0x0dea+redmine@...
Date: 2015-06-18T22:26:46+00:00
Subject: [ruby-core:69668] [Ruby trunk - Bug #11284] String#upcase and String#downcase don't work for accented characters

Issue #11284 has been updated by D.E. Akers.


http://stackoverflow.com/a/4418681

It would be unreasonable to add natural language processing to Ruby for the sake of a few methods, and it's easy to argue the case for not doing it at all over doing it incorrectly.

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Bug #11284: String#upcase and String#downcase don't work for accented characters
https://bugs.ruby-lang.org/issues/11284#change-53028

* Author: Pablo Herrero
* Status: Open
* Priority: Normal
* Assignee: 
* ruby -v: ruby 2.2.2p95 (2015-04-13 revision 50295) [x86_64-linux]
* Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN, 2.2: UNKNOWN
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Many accented and other non-english characters fails to upcase/downcase properly.
Accented characters is the most common are the ones I keep stumbling upon,, but probably other germanic/nordic characters I'm not aware of have the same problems.

For example:

    "Hola, ��C��mo est��s?".upcase         # returns "HOLA, ��C��MO EST��S?"
    "CONFIAN��A".downcase                # returns "confian��a"
    "Un moment s'il vous pla��t".upcase  # returns "UN MOMENT S'IL VOUS PLA��T"



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