Đang chuẩn bị liên kết để tải về tài liệu:
Best of Ruby Quiz Pragmatic programmers phần 4

Nếu hội đồng quản trị làm mà không cần chạy một trò chơi là một trận hòa. Dưới đây là những gì một trò chơi chiến thắng bởi các cầu thủ X có thể kết thúc tìm kiếm như:Điều này thực sự chỉ là một lớp dữ liệu. Nó đặt ra một loạt các mặc định và sau đó cho phép người dùng thay đổi để phù hợp với nhu cầu của họ | Answer 4. Animal Quiz 81 Answer From page 11 4 Animal Quiz Everybody solved this one using pretty much the same technique. Jim Weirich explains the strategy There is an easy solution that represents the database as a binary tree with questions as interior nodes and possible animals as leaf nodes. Each interior question node has two children corresponding to a yes or no answer. The children are either further questions which will be asked or an animal which will be guessed . Couldn t have said it better myself. Let s see Jim s own implementation of said tree animal_quiz animals.rb usr bin env ruby require yaml require ui def ui ui ConsoleUi.new end Spring Cleaning I removed the letter y from the vowels in Animal.an because all but the most obscure words starting with y should still use a as an article for example a yew . class Question def initialize question yes no question question ye s yes @no no question unless question question.sub A a-z 1.upcase end def walk if ui.ask_if question yes yes.walk else no no.walk end Report erratum Answer 4. Animal Quiz 82 self end end class Animal attr_reader name def initialize name @name name end def walk if ui.ask_if Is it an name ui.say Yea I win n n self else ui.say Rats I lose ui.say Help me play better next time. new_animal ui.ask What animal were you thinking of question ui.ask Give me a question to distinguish a an name from an new_animal . response ui.ask_if For an new_animal the answer to your question would be ui.say Thank you n n if response Question.new question Animal.new new_animal self else Question.new question self Animal.new new_animal end end end def an animal animal A aeiou an a animal end end if File.exist animals. yaml current open animals. yaml f YAML.load f.read else current Animal.new mouse end loop do current current.walk break unless ui.ask_if Play again ui.say n n end open animals.yaml w do f f.puts current.to_yaml end This is a very straightforward solution. At the top it brings in YAML for Report .