Method: MyMatrix#getDoubles

Defined in:
lib/mymatrix.rb

#getDoubles(arr) ⇒ Object 



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# File 'lib/mymatrix.rb', line 804

def getDoubles(arr)
  doubles = arr.select do |e|
   arr.index(e) != arr.rindex(e)
  end
  doubles.uniq!
  return doubles
end