A simple delegate to an array

delegate.rb

require 'forwardable'

class BenArray
  extend Forwardable

  def initialize
    @array = []
  end

  def_delegators :@array, :select, :reject, :<<
  
  def a
    select {|i| i < 4}
  end
  
  def b
    reject {|i| i > 2}
  end
end

ba = BenArray.new

ba << 5
ba << 4
ba << 3
ba << 2
ba << 1

puts ba.a.b.join(" ")