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Date: Mon, 21 Jul 2008 09:12:56 -0400
From: Steven Lembark <lembark@wrkhors.com>
Organization: Workhorse Computing
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Subject: Re: [gentoo-user] Non-case sensitive alphabetical sorting
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Mark David Dumlao wrote:
> When ordering items by name, a separate and distinct sequence is scene 
> for A-Z before the sequence for a-z. This is the expected behavior. What 
> might i need to look up to intermix [Aa]-[Zz]?


Schwartzian Transform is the perlish version of a
technique from LISP: create a compound structure
with the output as payload:

     my @sorted
     = map
     {
         $_->[-1]
     }
     sort
     {
         $a->[0] cmp $b->[0]
     }
     map
     {
         my $sortval = uc $_;

         [ $sortval, $_ ]
     }
     @unsorted_text;

You can use the basic technique to sort anything
(multi-level sorts, numeric, whatever). Same basic
process works in other languages that support anon
arrays or structs.


-- 
Steven Lembark                                            85-09 90th St.
Workhorse Computing                                 Woodhaven, NY, 11421
lembark@wrkhors.com                                      +1 888 359 3508