Try this, still using hash-of-arrays
#!/bin/perl -w
use strict;
use warnings;
# input
my %hash=();
my @filename = ('File1.txt','File2.txt');
for my $n (0..1){
parse($n,$filename[$n]);
};
output('output.txt');
# parse
sub parse {
my ($n,$filename) = @_;
open my $fh,'<',$filename or die "$!";
my $key;
while (<$fh>){
if (/^NAME/){
$key = $_;
$hash{$key}[$n] = '';
} else {
$hash{$key}[$n] .= $_ if $key;
}
}
close $fh;
}
# merge
sub output {
my ($filename) = @_;
open my $fh,'>',$filename or die "$!";
for my $key (sort keys %hash){
if (defined $hash{$key}[0]){
print $fh $key.$hash{$key}[0];
} else {
print $fh $key.$hash{$key}[1];
}
}
close $fh;
}
poj
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