Flatten a Ruby Array without using built-in 'flatten' method [closed]

Answer 1

Using recursion to solve this problem.

class ArrayConvert
    def self.flatten_array(array,init)
        array.each do |a|
         if a.class==Array
            flatten_array(a,init)
         else
            init << a
         end
        end
      init
    end

  p flatten_array([1, 2, 3, 4, [1, 2, 3, 4], 5],[])

end