Ruby 这个红宝石杂烩怎么了？

我是ruby的新手，经常会遇到以下错误：

在gem\u original\u require'：/helpers/navigation.rb:28：散列的奇数列表（SyntaxError）

感谢您的帮助

   module Sinatra::Navigation

        def navigation

            @navigation

                nav = {

                        primary[0] = {
                         :title => "cheddar",
                         :active => false,
                         :children => {
                           { :title => "cheese", :active => false },
                           { :title => "ham", :active => false }
                          }
                        },

                        primary[1] = {
                         :title => "gorgonzola",
                         :active => false,
                         :children => {
                           { :title => "What is the cheese?", :active => false },
                           { :title => "What cheese", :active => false },
                           { :title => "What does the cheese tell us?", :active => false, :children => {
                              { :title => "Cheessus", :active => false },
                              { :title => "The impact of different cheeses / characteristics for cheese in relation to CHSE outcomes", :active => false }
                            }
                           }
                          }
                        }
                }

---

在ruby中，大括号用于描述由成对的键和值组成的hashmap。方括号用于描述数组。您的children属性不包含键值对，因此必须将其转换为数组而不是散列

所以不是

:children => {
  { :title => "cheese", :active => false },
  { :title => "ham", :active => false }
}

做：

对于其他出现的

：children

，情况也是如此

我也不确定

primary[0]=

应该实现什么，但几乎可以肯定，它并没有达到您想要的效果。它所做的是将

primary

的第一个元素设置为assign（这意味着在该赋值之前必须存在一个名为primary的数组），然后返回该元素

如果您想构造哈希，以便可以像

nav[：primary][0][：children][0]

那样访问它，您必须这样做：

nav = {
  :primary => [
    {:title => "cheddar",
     :active => false,
     :children => [
                    { :title => "cheese", :active => false },
                    { :title => "ham", :active => false }
                  ]
    },
    {
       :title => "gorgonzola",
       #...
    }]
}

---

还请注意，在分配给

nav

之前的行

@navigation

完全没有任何作用。

在第一个散列中，您有

:children => {
    { :title => "cheese", :active => false },
    { :title => "ham", :active => false }
}

---

你的：children散列应该是一个数组，用方括号而不是大括号构造：）

我想你可能把数组和散列混淆了。（我认为）有两点可能需要使用数组

[]

而不是散列

{}

。固定代码如下：

nav = [
       { :title => "cheddar",
         :active => false,
         :children => [
            { :title => "cheese", :active => false },
            { :title => "ham", :active => false }
           ]
        },
        { :title => "gorgonzola",
          :active => false,
          :children => [
           { :title => "What is the cheese?", :active => false },
           { :title => "What cheese", :active => false },
           { :title => "What does the cheese tell us?", :active => false, 
             :children => [
               { :title => "Cheessus", :active => false },
               { :title => "The impact of different cheeses / characteristics for cheese in relation to CHSE outcomes", :active => false }
            ]
          }]
        }
     ]

---

所有答案看起来都是正确的，所以感谢大家，这是最快的，非常简洁，现在扩展了，再次感谢这个答案，你真的超越了职责的召唤，你的建议帮了我很多忙，我已经以这种方式重组了它，而且它的方式更加简单。这个缩进太可怕了！

nav = [
       { :title => "cheddar",
         :active => false,
         :children => [
            { :title => "cheese", :active => false },
            { :title => "ham", :active => false }
           ]
        },
        { :title => "gorgonzola",
          :active => false,
          :children => [
           { :title => "What is the cheese?", :active => false },
           { :title => "What cheese", :active => false },
           { :title => "What does the cheese tell us?", :active => false, 
             :children => [
               { :title => "Cheessus", :active => false },
               { :title => "The impact of different cheeses / characteristics for cheese in relation to CHSE outcomes", :active => false }
            ]
          }]
        }
     ]