This should be about twice as fast for large hashes... 

my $defined    = grep defined, values %h;
my $notdefined = keys(%h) - $defined;

print "defined     - $defined\n";
print "not defined - $notdefined\n";

[download]

-sauoq
"My two cents aren't worth a dime.";

In reply to Re: Re: Counting keys with defined or undefined elements in a hash by sauoq
in thread Counting keys with defined or undefined elements in a hash by Bukowski

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