note
reasonablekeith
With reference to your update, you were pretty close, you just needed to actually compare the values to went to the trouble of extracting :) ...
<code>
sub files_sort {
my $first_number;
my $second_number;
if ($a =~ /(\d+)_(\d+)_duration_(\w+)_comptage_(\d+).txt$/){
$first_number = $1;
}
if ($b =~ /(\d+)_(\d+)_duration_(\w+)_comptage_(\d+).txt$/){
$second_number = $1;
}
$first_number <=> $second_number;
}
</code>
Have a look in 'perldoc perlop' if you don't know what the 'space ship' operator does, it's _very_ handy for sort functions, and is doing what you were trying to do with your if's and elses.
<p>
I would add though, that if this was my code, I'd probably write a sub to extract the index number from the file name, and write the whole thing like this.
<code>
sub my_sort {
parse_file_name($a) <=> parse_file_name($b);
}
sub parse_file_name {
if ($_[0] =~ /(\d+)_\d+_duration_\w+_comptage_\d+.txt$/) {
return $1;
} else {
return 0;
}
}
</code>
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