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  1. # To use this, simply require this file and it will become an extension of the base Array class. As such you can then do
  2. # [1,2,[3]].custom_flatten as in Array.flatten instance method.
  3. class Array
  4.   def custom_flatten(array=self)
  5.     array.each_with_object([]) do |e, flattened|
  6.       flattened.push *(e.is_a?(Array) ? custom_flatten(e) : e)
  7.     end
  8.   end
  9. end
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