Hi, I'm interested in finding a quick way to see if a set of words is a subset of another set of words. Doing this with arrays or hashes is simple. I was wondering if there's a way do it more efficiently via a clever regex (say by comparing two strings where the words are sorted and joined by a known delimiter). For instance: 
my $a = "AB:APPLE:BOY:ZOO:ZOOM";
my $b = "APPLE:ZOO";
my $c = "BOY: GIRL";

isSubset($b, $a) returns 1 # $b is a "subset" of $a.  
isSubset($c, $a) returns 0 # $c is not a "subset" of $a.

[download]
Thanks for your insight

In reply to Computing Subsets by grandpascorpion

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