This is inefficient, but I use it for intersection when I know I'm guaranteed small list sizes, and it's more valuable / pleasing to me to have a one-line solution:

my @isect = map { my $b = $_; grep { $_ eq $b } @a } @b;

In reply to Re: How can I find the union/difference/intersection of two arrays? by Dev Null
in thread How can I find the union/difference/intersection of two arrays? by vroom

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