On Mon, May 21, 2012 at 12:19:26PM -0700, Linda Walsh wrote: > Greg Wooledge wrote: > >For instance, on HP-UX 10.20, in the en_US.iso88591 locale: > > A a ... B b > >Meanwhile, on Debian 6.0, in the en_US.iso88591 locale: > > a A ... b B
> So which is correct? Both. Locale collating order is determined by the OS. You cannot rely on it, unless you set the LC_COLLATE variable to "C" or "POSIX", in which case you get ASCII behavior (accented letters are not part of the character set at all). > Anyone wanting to reference an upper or lower case range > [a-z] or [A-Z], is gonna hurt from this. Correct. imadev:~$ echo Hello World | tr 'A-Z' 'a-z' hÉMMÓ wÓSMÐ imadev:~$ echo Hello World | tr '[:upper:]' '[:lower:]' hello world You *cannot* use [a-z] or [A-Z] any more, except in the C/POSIX locale. If you want to match lowercase characters, you should be using [[:lower:]], and for uppercase characters, [[:upper:]].
