The problem is that I want to _reproduce_ under Perl the same order relation that the system level sort uses

What problem? You should have checked what order the system's sort uses. 

$ cat >data
aaa2000@yahoo.com
aaa_2000@yahoo.com
aaa2000
aaa_2000

$ export LC_COLLATE=en_US.UTF-8

$ sort data
aaa2000
aaa_2000
aaa_2000@yahoo.com
aaa2000@yahoo.com

$ perl -le'use locale; chomp(@a=<>); print for sort @a;' data
aaa2000
aaa_2000
aaa_2000@yahoo.com
aaa2000@yahoo.com

$ export LC_COLLATE=C

$ sort data
aaa2000
aaa2000@yahoo.com
aaa_2000
aaa_2000@yahoo.com

$ perl -le'use locale; chomp(@a=<>); print for sort @a;' data
aaa2000
aaa2000@yahoo.com
aaa_2000
aaa_2000@yahoo.com

[download]

Whether the order makes sense or not, it's doing exactly what you want.

In reply to Re^5: perllocale weirdness, bug, or...? by ikegami
in thread perllocale weirdness, bug, or...? by Krambambuli

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