Well, you can get a lot of this done using File::Find and Text::CSV_XS. Some example code: 

use strict; use warnings;
use Text::CSV_XS;
use IO::File;
use File::Find;

my (%data, @file);
my $in_csv = Text::CSV_XS->new({ sep_char => " " });     #space-sep in
my $out_csv = Text::CSV_XS->new({ sep_char => "\x09" }); #tab-sep out
my $out = IO::File->new('report.tab','>') 
  or die "Can't open report.tab for writing: $!\n";

find(\&parse_file, '.');  #find files, running parse_file() for each

$out_csv->print($out, [ 'Name', @file ]);

## write out report
foreach my $name (sort keys %data) {
    my @row = ($name);
    foreach (@file) {
        push @row, $data{$name}{$_};
    }

    $out_csv->print($out, \@row);
}

sub parse_file {
    # only deal with *files* that match naming convention
    return unless -f $_ && m/RESULTS_FILE\.(\d+)/; 

    my $file_number = $1; # captured number from match
    my $filename = $_;
    push @file, $filename; 

    my $io = IO::File->new($filename,'<') or do {
        warn "Can't open $filename: $!\n";
        return;
    };

    while (my $row = $in_csv->getline($io)) {
        # e.g. first row in your example results in:
        # $data{Kostas}{RESULT_FILE.1} = Number1
        $data{ $row->[0] }{ $filename } = $row->[1];
    }
}

[download]

I think you'll find that very fast and maintainable.

<–radiant.matrix–>
Ramblings and references
The Code that can be seen is not the true Code
I haven't found a problem yet that can't be solved by a well-placed trebuchet

In reply to Re: Is this possible by radiantmatrix
in thread Is this possible by Anonymous Monk

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