为什么在向散列添加散列时，Ruby似乎嵌套了添加的散列？

Question

我试图创建如下所示的二维散列：

permissions['enrollment'] = ['read' => true, 'create' => true, 'update' => true] 
permissions['invoices'] = ['read' => true, 'create' => false, 'update' => false] 

这是我做的......

permissions = Hash.new 
permissions['enrollment'] = ['read' => true, 'create' => true, 'update' => true] 
permissions['invoices'] = ['read' => true, 'create' => false, 'update' => false] 

当我“放”在IRB权限我得到这个...

{ 
    "enrollment"=>[{"read"=>true, "create"=>false, "edit"=>false}], 
    "invoices"=>[{"read"=>true, "create"=>false, "update"=>false}] 
} 

正如你可以从上面的输出看，似乎是权限另一散列内的哈希[“招生”] [{}]！

我要访问的读取权限这样招生：permissions['enrollment']['read']，但根据puts permission它不会工作，我得到这个错误TypeError: can't convert String into Integer

对于我访问入学读权限，我需要做的这个：permissions['enrollment'][0]['read']。

如何使注册读取权限如此... permissions['enrollment']['read']？

Answer 1

您的语法关闭。哈希由花括号分隔。方括号用于数组。如果你来自PHP世界，你可能会混淆两者。试试这个：

permissions = Hash.new 
permissions['enrollment'] = {'read' => true, 'create' => true, 'update' => true} 
permissions['invoices'] = {'read' => true, 'create' => false, 'update' => false}