完成了一个关于Hash & Symbols的迷你项目，想看看它在终端中是如何运行的。
它在Codeacademy中执行得很好，但在终端中它打印出错误的响应，似乎是因为它没有正确引用哈希数组。
尽管我给予终端的输入不存在于哈希数组中，它还是打印出“It's already on the list！”
是codeacademy教得不对，还是我的代码有一些特定于终端的问题？
movies = {
Hackers: 8.0,
Gladiator: 9.0,
}
puts "Would you like to add, update, display, or delete movies?"
choice = gets.chomp
case choice
when "add"
puts "What's the movie called?"
title = gets.chomp.to_sym
puts "What would you rate it out of 10?"
rating = gets.chomp.to_i
if movies[title.to_sym] = nil
movies[title.to_sym] = rating.to_i
puts "The movie has been added!"
else puts "It's already on the list!"
end
1条答案
按热度按时间du7egjpx1#
=是赋值运算符，而==是比较运算符。=运算符用于将值赋值给变量，而==运算符用于比较两个变量或常量。了解两者的区别很重要，Code Academy环境可能会解决这个问题。Ruby也有一个
===运算符。