Question

我正在学习Ruby和Sinatra的指南，让我为纸牌游戏编写以下代码（基于Play Your Cards Right）。

这是代码

enable :sessions

get '/' do
    session[:deck] = []
    suits = %w[ Hearts Diamonds Clubs Spades ]
    values = %w[ Ace 2 3 4 5 6 7 8 9 10 Jack Queen King ]
    suits.each do |suit|
        values.each do |value|
            session[:deck] << "#{value} of #{suit}"
        end
    end
    session[:deck].shuffle!
    session[:guesses] = -1
    redirect to('/play')
end

get '/:guess' do

    card = session[:deck].pop
    value = case card[0]
        when "J" then 11
        when "Q" then 12
        when "K" then 13
        else card.to_i
    end

    if (params[:guess] == 'higher' and value < session[:value]) or (params[:guess] == 'lower' and value > session[:value])
        "Game Over! The card was the #{card} (value #{value}), and you had #{session[:value]}. You managed to make #{session[:guesses]} correct guess#{'es' unless session[:guesses] == 1}. <a href='/'>Play Again</a>"
    else
        session[:guesses] += 1
        session[:value] = value
        "The card is the #{card} (value of #{value}). Do you think the next card will be <a href='/higher'>Higher</a> or <a href='/lower'>Lower</a>?"
    end
end

游戏似乎在某些时候玩得很好，但是，出于某种原因，会话变量value似乎在IF语句执行之前被新值覆盖。

我不知道上面的代码可能出现什么问题，以及value会话变量为什么不随意更改为新值。

请查看我的代码（或尝试自己运行代码）并告诉我可能出现的问题。

我的config.ru文件：

require 'rubygems'
require 'sinatra'

set :environment, ENV['RACK_ENV'].to_sym
disable :run, :reload

require './play_your_cards_right.rb'

run Sinatra::Application

Ruby Sinatra应用程序没有正确存储会话变量

0 个答案: