ralbt

class LRUCache
  attr_reader :dll, :hash, :count, :capacity
  def initialize(capacity)
    @dll = DLL.new
    @hash = Hash.new
    @count = 0
    @capacity = capacity
  end

  def read(key)

ralbt

class BinaryTree
  attr_reader :root

  def initialize(root)
    @root = root
  end

  def level_order_traversal
    if root.nil?
      puts "Queue is empty"

ralbt

class BinaryTree
  attr_reader :root

  def initialize(root)
    @root = root
  end

  def print_inorder_with_recursion(current)
    return if current.nil?