语法错误，意外的keyword_when，期待$ ruby​​代码，codecademy，电影之夜6/10

Question

我在codecademy.com上练习ruby，我收到一个奇怪的错误，但是当我看到代码时，它对我来说是正确的。 以下是我的代码，（您还可以在CodePad

查看代码及其输出

null

这是我收到的错误消息，

movies = {
    'Janwar' =>  4,
    'Tum Bin' =>  3,
    'PK' => 3
}

puts "Select your favorite movie"
puts "type \"add\" to add a movie to the list"
puts "type \"delete\" to delete a movie"
puts "type \"display\" to list the movies"

choice = gets.chomp

case choice
when "add"
    puts "Please say the movie title"
    title = gets.chomp
    puts "What is the rating of the movie"
    rating = gets.
    if  movies[title.to_sym].nil? == true
        movies[title.to_sym] = rating.to_i
    else
        puts "the thing you wanna add is already there"
    end
when "update"
    puts "Updated!"
when "display"
    puts "Movies!"
when "delete"
    puts "Deleted!"
else
    puts "Error!df"
end

有人请在CodePad运行此代码并查看错误是什么？

先谢谢你！

Answer 1

这里你错过了一个方法：

 rating = gets. #<<

您可能想要的是rating = gets.chomp。