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

Using chunk_while:

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

Ruby prior to 2.3:

[5, 5, 2, 2, 2, 6, 6].each_with_object([]) do |e, acc|
  acc.last && acc.last.last == e ? acc.last << e : acc << [e]
end
#=> [[5, 5], [2, 2, 2], [6, 6]]