Question

我被困在下面的练习中。

说明：

在您的“添加”时块中，删除“添加的”看跌期权。声明。

在其位置提示用户输入电影标题。将结果保存到名为title的新变量中。（您的代码已经有一个执行此操作的示例！）

接下来，提示用户输入电影的分级。将其保存到一个新的名为rating的变量中。

将该电影/评级对添加到电影哈希中，并显示一条消息，指示已添加该对。（现在还不需要to_sym或to_i！）

代码：

movies = {"good fellas"=> "5"}
  puts "what's your favorite movie?"
  choice=gets.chomp
case choice
  when "add"
    puts "what's the movie you would like to add?"
    title=gets.chomp
    movies[title]
    puts"what's the rating for your selected movie?"
    rating=gets.chomp
    movies[title]=rating
  when "update"
    puts "Updated!"
  when "display"
    puts "Movies!"
  when "delete"
    puts "Deleted!"
else
    puts "Error!"
end

Answer 1

可以将键/值对添加到哈希中，如下所示：

hash[key] = value

所以在您的情况下：

when "add"
  puts "what's the movie you would like to add?"
  title=gets.chomp

  puts "what's the rating for your selected movie?"
  rating=gets.chomp

  movies[title] = rating
  puts "movie added"

Answer 2

以下应为您的代码

movies = {"good fellas"=> "5"}
puts "what's your favorite movie?"
choice=gets.chomp
case choice
  when "add"
    puts "what's the movie you would like to add?"
    title=gets.chomp
    #movies[title]
    puts"what's the rating for your selected movie?"
    rating=gets.chomp
    movies[title]=rating
  when "update"
    puts "Updated!"
  when "display"
    puts "Movies!"
  when "delete"
    puts "Deleted!"
else
    puts "Error!"
end

如何将键/值对添加到哈希中？

2 个答案: