In Perl, how can I iterate over the Cartesian product of multiple sets?

Posted by nubie2 on Stack Overflow See other posts from Stack Overflow or by nubie2
Published on 2010-03-16T18:34:58Z Indexed on 2010/03/16 20:41 UTC
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cartesian-product

I want to do permutation in Perl. For example I have three arrays: ["big", "tiny", "small"] and then I have ["red", "yellow", "green"] and also ["apple", "pear", "banana"].

How do I get:

["big", "red", "apple"]
["big", "red", "pear"]

..etc..

["small", "green", "banana"]

I understand this is called permutation. But I am not sure how to do it. Also I don't know how many arrays I can have. There may be three or four, so I don't want to do nested loop.

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