Ruby中对象的变量更改方法答案

【问题标题】：Object's variable changing method in RubyRuby中对象的变量更改方法
【发布时间】：2012-08-27 14:50:40
【问题描述】：

我有一个名为 Movie 的课程：

class Movie 
    attr_accessor :title, :director, :date_of_issue, :register_number
    def initialize(title, director, date_of_issue, register_number)
        @title, @director, @date_of_issue, @register_numver = title, director, date_of_issue, register_number
    end
    def Basic_info
        puts "Title : #{@tytul}, Director: #{@autor}"
    end
end

我想创建一个方法来更改现有 Movie 对象的变量，而不是创建一个全新的对象。可能吗？如果有，怎么做？

【问题讨论】：

您的方法 Basic_info 实际上应该是 basic_info 以便遵循 Ruby 的最佳实践。

标签： ruby oop class variables object

【解决方案1】：

你不需要一个方法，你在正确的轨道上，虽然纠正了一些错误

class Movie  
  attr_accessor :title, :director, :date_of_issue, :register_number 
  def initialize(title, director, date_of_issue, register_number) 
    @title, @director, @date_of_issue, @register_numver = title, director, date_of_issue, register_number 
  end 
  def basic_info 
    puts "Title : #{@title}, Director: #{@director}" 
  end 
end  

movie = Movie.new "title", "director", "", 0
movie.director = "Martin Scorsese"
movie.title = "Goodfellas"
movie.date_of_issue = "1990"
movie.basic_info

#=>Title : Goodfellas, Director: Martin Scorsese

【讨论】：

谢谢！顺便提一句。 “好家伙是我最喜欢的电影之一。