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Re: logic question

by Masem (Monsignor)
on Feb 14, 2002 at 19:10 UTC ( #145534=note: print w/replies, xml ) Need Help??


in reply to logic question

Assuming that when you mean records, you have a single unique id value that is stored in the array, then you can do the usual trick of using a hash as a search mechanism:
my %temphash = map { $_ => 1 } @arrayA; my @inBbutnotA = grep { !$temphash{ $_ } } @arrayB;
If your record is more complicated, you have have to add another step to break out the unique id for either of these steps, but the idea is still the same.

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