Ruby - collect same numbers from array into array of arrays

Question

I have created a very ugly script to collect same numbers from an array. I don\'t think this is a very Ruby way :) Anyone could provide a more clean solution?

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Answer 1

[5, 5, 2, 2, 2, 6, 6].slice_when(&:!=).to_a
  #=> [[5, 5], [2, 2, 2], [6, 6]] 

One could perhaps say that Enumerable#chunk_while and Enumerable#slice_when are ying and yang.

Prior to Ruby v2.3, one might write

[5, 5, 2, 2, 2, 6, 6].chunk(&:itself).map(&:last)

and prior to v2.2,

[5, 5, 2, 2, 2, 6, 6].chunk { |n| n }.map(&:last)