Question

我正在尝试将团队名称存储在@wins或@loss中，具体取决于与相应密钥相关联的主页和分数。

@leaderboard_info = [{
                      home_team:"Patriots",
                      away_team: "Broncos",
                      home_score: 7,
                      away_score: 3
                      }, 
                      #more info in hashes.........]

@wins = []
@loss = []

@leaderboard_info.each do |game|
  game.each do |key,value|
    if value[:home_score] > value[:away_score]  #7 > 3
      @win << value[:home_team]   #Patriots
      @loss << value[:away_team]  #Broncos 
    else
      @loss << value[:home_team]
      @win << value[:away_team]
    end
  end
end

但我一直遇到这个错误

[]': no implicit conversion of Symbol into Integer (TypeError)

if语句应该抓住7和3的具体值。然后它应该推送由值存储的团队名称。为什么不工作？我用key[home_score]等尝试了它，但它仍然不起作用。

Answer 1

我认为您应该删除双循环并将其更改为：

@leaderboard_info.each do |game|
  if game[:home_score] > game[:away_score]
    @win << game[:home_team]
    @loss << game[:away_team]
  else
     @loss << game[:home_team]
     @win << game[:away_team]
  end
end

Answer 2

问题是你在Hash上调用每个Hash，它会产生（如你的代码所指出的）Hash中每个记录的键和值。所以当你调用value [：home_team]时，你在String（“爱国者”）上使用[]方法。 String上的[]方法需要一个Fixnum（用于分解字符串）。

错误：“没有将符号隐式转换为整数”

2 个答案: