It might be more efficient (depending on the sizes of the 2 arrays) to make a hash from one to do a quick lookup:

my %HashB = map { ($_ => 1) } @ArrayB;
@ArrayA = grep { $HashB{$_} } @ArrayA;

[download]

-ben

Originally posted as a Categorized Answer.

In reply to Re: How Do I Compare Array A to Array B, removing B elements from A. by knobunc
in thread How Do I Compare Array A to Array B, removing B elements from A. by fuzzball

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