Dear Monks, I have to anonymize several files (semicolon-separated). The following script does the job. But: if the field "Number_1" is the last field, then it stays unchanged. With the dummy field (see DATA) it works. Where is the mistake? Thank you very much! VE 
use strict;
use Text::ParseWords;


while(<DATA>)    {
my @Proto = <DATA>;
my $Header = shift @Proto;
my @Assembly;

my $Nr = &parsingHeader($Header, "Number"); 
my $Nr_1 = &parsingHeader($Header, "Number_1");
my $name = &parsingHeader($Header, "Name");

foreach(@Proto)    {
my @fields = quotewords( ';', 0, $_);
$fields[$Nr] =~tr/0123456789/9876543210/ if defined $Nr;
$fields[$Nr_1] =~tr/0123456789/9876543210/ if defined $Nr_1;
$fields[$name] =~tr/A-Za-z/B-Wzb-w/ if defined $name;

push @Assembly, join(";",@fields);
}
unshift @Assembly, $Header;
print @Assembly;
}


sub parsingHeader {
my $x;
my $Row = shift @_;
my $Column = shift @_;
my @parts = split(/;/, $Row);

for(my $i = 0; $i <= @parts; $i++)
{
if($parts[$i] eq $Column) {
$x = $i;
last;
};
}
return $x;

}


__DATA__

Number;Name;Age;Gender;Number_1;Dummy
123;Andrew;54;m;123;AAA
234;John;43;m;234;JJJ
345;Helen;23;w;345;HHH

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In reply to Parsing Header Last Field by Anonymous Monk

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