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Re^3: Faster grep in a huge file(10 million)

by Cristoforo (Deacon)
on May 10, 2013 at 22:34 UTC ( #1033051=note: print w/replies, xml ) Need Help??

in reply to Re^2: Faster grep in a huge file(10 million)
in thread Faster grep in a huge file(10 million)

print $line if defined $file2{$line};
I think that finds lines in file 1 that are also in file 2. To find lines in file 1 not in file 2, maybe change that to:

print $line unless defined $file2{$line};

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