... back to the original problem of replacing the hash keys with the hash values.

You say you know your translation hash is being built properly, so since I'm about to turn into a pumpkin, let me leave you with the following code to think about: 

use warnings FATAL => 'all';
use strict;


my %hash = (
    'nc7-52' => 'C_fraterna',
    'mi9-87' => 'D_whatever',
    );

my ($search) =
    map  qr{ $_ }xms,
    join ' | ',
    keys %hash
    ;
print "search regex: \n", $search, "\n\n";  # FOR DEBUG


print "output: \n";
while (<DATA>) {
    my $line = $_;
    $line =~ s{ \A ($search) (?= :) }{$hash{$1}_$1}xms;
    print $line;
    }


__DATA__
nc7-52:p39|read1|1|19|296|0.0642
ia1-23:p42|read1|1|19|296|0.0642
mi9-87:p77|read1|1|19|296|0.0642

[download]
Play with it and get the substitutions right, and you can move on to the business of writing the edited file tomorrow.

Give a man a fish:   <%-(-(-(-<

In reply to Re^5: In place search and replace with a hash by AnomalousMonk
in thread In place search and replace with a hash by hkates

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