Hi

I give that as a starting point. Nr. 1 should be solved. the rest is an execise for tsk1979. 

#!/usr/bin/perl
use warnings;
use strict;

use Text::CSV;
use Data::Dumper;

die "ERROR: You have to provide at least one csv file."
    unless(@ARGV);

my %RESULT;

foreach my $filename (@ARGV) {
    if(grep { $_ eq $filename } keys %RESULT) {
        warn "WARN: Why dou you want to compare a file '$filename' whi
+ch you have read already. Skipped.";
        next;
    }
    my $csv = Text::CSV->new(
         { binary => 1 }
    ) or die "Cannot use CSV: " . Text::CSV->error_diag ();

    open my $fh, "<", $filename or die "ERROR: Can't open '$filename':
+ $!";
    my $counter = 0;
    while (my $row = $csv->getline($fh)) {
        $counter++;
        next if($counter < 2);
        unless(@$row <= 11) {
            die "ERROR: Line '$counter' of file '$filename' has wrong 
+format. Check your data crap.";
        }
        my $index = $row->[0];
        my $index_id = $row->[1];
        $RESULT{$filename}->{$index}->{$index_id} = { 'record' => $row
+ };
    }
    $csv->eof or die "ERROR: Couldn't read csv file '$filename': " . $
+csv->error_diag();
    close $fh;
}

# Missing keys
my %FOUND_KEYS;
my $files_loaded = scalar keys %RESULT;

foreach my $filename (keys %RESULT) {
    foreach my $index (keys %{$RESULT{$filename}}) {
        foreach my $index_id (keys %{$RESULT{$filename}->{$index}}) {
            my $key = $index . '@' . $index_id;
            my $hash_ref = $FOUND_KEYS{$key} || {};
            $hash_ref->{$filename} = 1;
            $FOUND_KEYS{$key} = $hash_ref;
        }
    }
}
foreach my $key (keys %FOUND_KEYS) {
    if(scalar keys %{$FOUND_KEYS{$key}} != $files_loaded) {
        print "INFO: Key combination '$key' only found in the followin
+g files: " . join(', ', sort keys %{$FOUND_KEYS{$key}}) . "\n";
    }
}

[download]

Best regards
McA

In reply to Re: Diff CSV files - But ignore certain fields by McA
in thread Diff CSV files - But ignore certain fields by tsk1979

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