Good use of a "seen" hash, asarih, but i have to say that i would rather use this: 
my ($value,$key) = $_ =~ /^([^\|]+)\|(.*)/;

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than explicitly "spell out" $1 and $2. But if all you want to do is split at the first pipe, just use split: 
my ($key,$value) = split(/\|/,$_,2);
next if $seen{$value};
print "$key: $value\n";
$seen{$value}++;

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I don't have time for some benchmarking right now, but substr and index are fast: 
my $index = index($_,'|');
my $key   = substr($_,0,$index);
my $value = substr($_,$index);

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Just some more ways to do it. ;)

jeffa

L-LL-L--L-LL-L--L-LL-L--
-R--R-RR-R--R-RR-R--R-RR
B--B--B--B--B--B--B--B--
H---H---H---H---H---H---
(the triplet paradiddle with high-hat)

In reply to 2Re: Improvement on script needed. by jeffa
in thread Improvement on script needed. by Anonymous Monk

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