linkList.rb

class Node
    attr_accessor :data, :next

    def initialize(data=nil)
        @data = data
    end
end

# Without arbitrary args
class List
    attr_accessor :head, :tail, :nodes
    attr_reader :count

    def initialize
        @head = nil
        @tail = nil
        @nodes = Node.new
        @count = 0
    end

    def insertFirst(val)
        new_node = Node.new(val)
      	new_node.next = @nodes
      	@head = val
     	 	@tail = new_node.next
     	 	@nodes = new_node
      	@count += 1
    end
end