I modified the above as follows but it will probably make you perl programmers cringe with despair. Sorry rolf for desecrating your original answer :) 


use strict;
use warnings;
 
 $" = ', ';
my @datas;
 
#- parse input
for (<DATA>){
  my @entries = m/<(\d+),(\d+)>/;
  push @datas, [@entries];
  
 
}
 
#- sort
@datas=sort sort_test @datas;

#- output
use Data::Dumper;
print Dumper \@datas;
 
sub sort_test()
{
    if ($a->[0] < $b->[0])
    {
        return -1;
    }elsif ($a->[0] > $b->[0]){
        return 1
    }else {
        if ($a->[1] > $b->[1]) {
            return -1;
        } elsif ($a->[1] < $b->[1]) {
            return 1;
        } else {
            return 0;
        }
    }
    
}
__DATA__
<12,20>          
<1,5>
<7,10>
<7,12>
<7,15>

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In reply to Re^3: beginner - ordering tuples by Anonymous Monk
in thread beginner - ordering tuples by Anonymous Monk

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