data-structures-naivelinkedlist.rb

module DataStructures
  class NaiveLinkedList
    def initialize()
      @head = nil
    end
    def [](index)
      node = @head

      self.loop_set_node(index, node)
      node.value()
    end
    def []=(index, value)
      node = @head

      self.loop_set_node(index, node)

      node.value = value
    end
    def <<(value)
      new_node = Node.new(value)

      if @head != nil
        node = @head

        while node.other() != nil
          node = node.other()
        end

        node.other = new_node
      else
        @head = new_node
      end
    end
    def loop_set_node(iterations, node)
      (0...iterations).each() do
        node = node.other()
      end
    end
  end
end

data-structures-node.rb

module DataStructures
  class Node
    attr_accessor(:other)
    attr_accessor(:value)

    def initialize(value, other = nil)
      @other = other
      @value = value
    end
  end
end