Find a set of common elements from a multi-dimensional array recursively

Posted by shreyas on Stack Overflow See other posts from Stack Overflow or by shreyas
Published on 2010-04-06T12:45:13Z Indexed on 2010/04/06 17:53 UTC
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multidimensional-array

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ruby

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combinations

I have a multi-dimensional array:

a=[[2,3,4],[1,3,4],[1,2],[1,2,3,4]]

i've to compare all the 4 sub-arrays and get common elements.Next,take 3 subarrays at a time and get common elements.then take 2 sub arrays at a time and get common elements, in RUBY.

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