I don't know if this is a better or worse solution, but I'm showing you mine (filenames are only an example, chage them if you have to):

#!/usr/bin/perl

use strict;
use warnings;

# Constants
my $BLANK_LINE = qr/^\s+$/;
my $KEY = qr/>([A-Z]{1})/;

# Variables
my %content;

# Take the data
for (<*.db>) {
    open(FILEDB, $_) or die "Cannot open file $_: $!\n";
 
    my $key;
    for (<FILEDB>) {
        if (/$BLANK_LINE/) {
            next;
        } elsif (/$KEY/) {
            $key = $1;
            if (not $content{$key}) {
                $content{$key} = ();
            }
        } else {
            chomp;
            push (@{$content{$key}}, $_);
        }
    }
 
    close(FILEDB);
}

# Write the new file
open(FILEDB, ">result.db") or die "Cannot open file result.db: $!\n";

for my $key (sort keys %content) {
    print FILEDB ">$key\n\n" . join(", ", @{$content{$key}}) . "\n\n";
}

close(FILEDB);

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In reply to Re: hash of hashes? by txixco
in thread hash of hashes? by sanahmed

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