From: "Jake S." <jakesmmrs2@...>
Date: 2011-12-25T09:28:05+09:00
Subject: Partitioning an array

I'm looking for a method that takes an array and returns its elements
grouped together in arrays of length 2, with the array at the very end
having a length of 1 or two.

For example:
group [1,2,3,4,5,6] #=> [[1,2],[3,4],[5,6]]
group ['f','o','o'] #=> [['f','o'],['o']]

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