Re^3: counting instances of one array in another array

my %seen;
$seen{$_}++ for @observed;
@permCounts = map { $seen{$_} || 0 } @perms;
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Re^4: counting instances of one array in another array by JavaFan (Canon) on Feb 23, 2012 at 14:50 UTC
And then you're back to the OPs problem again: the array `@perm`. Which will be huge.	[reply] [d/l]