How to break down an array within an superclass object and place array elements into two subclasses objects in Ruby [closed]

Answer 1

You can use Enumerable#partition:

array = [1, 2, 3, 4]
array.partition { |x| x % 2 == 1 }
# => [[1, 3], [2, 4]]
odd, even = array.partition {|x| x % 2 == 1}
odd
# => [1, 3]
even
# => [2, 4]

---

class One
  attr_reader :array
  def initialize(array)
    @array = array
  end
end

class Two < One
  attr_reader :array
  def initialize
    @array = []
  end
end

array = [1,2] 
a = One.new(array)
b = Two.new
c = Two.new

odd, even = array.partition {|x| x % 2 == 1}
b.array.concat odd
c.array.concat even
b.array
# => [1]
c.array
# => [2]

NOTE: As meagar commented, the problem is not related with inheritance. You don't need to use class here at all.