Question

我有一个哈希：

[{:count=>274, :label=>"Minas Gerais"}, {:count=>300, :label=>"São Paulo"}, {:count=>73, :label=>"Rio de Janeiro"}, {:count=>11, :label=>"Espírito Santo"}, {:count=>41, :label=>"Paraná"}, {:count=>70, :label=>"Santa Catarina"}, {:count=>81, :label=>"Rio Grande do Sul"}, {:count=>23, :label=>"Bahia"}, {:count=>3, :label=>"Alagoas"}, {:count=>8, :label=>"Amazonas"}, {:count=>1, :label=>"Amapá"}, {:count=>24, :label=>"Ceará"}, {:count=>62, :label=>"Distrito Federal"}, {:count=>35, :label=>"Goiás"}, {:count=>2, :label=>"Maranhão"}, {:count=>7, :label=>"Mato Grosso do Sul"}, {:count=>6, :label=>"Mato Grosso"}, {:count=>11, :label=>"Pará"}, {:count=>11, :label=>"Paraíba"}, {:count=>29, :label=>"Pernambuco"}, {:count=>1, :label=>"Piauí"}, {:count=>6, :label=>"Rio Grande do Norte"}, {:count=>1, :label=>"Roraima"}, {:count=>4, :label=>"Sergipe"}, {:count=>2, :label=>"Tocantins"}]

我需要访问这些值并进行一些计算。我正在使用迭代来在哈希中访问每个数组，如下所示：

<% region.each do |key| %>
  <%= key %>
  <br>
<% end %>

结果：

 ....
 {:count=>11, :label=>"Espírito Santo"} 
 {:count=>41, :label=>"Paraná"}
 {:count=>70, :label=>"Santa Catarina"}
 ....

在这个内部，我想得到每个计数和每个标签，所以我尝试了这个：

<% region.each do |key| %>
  <%= key[0] %>
  <%= key[1] %>
  <br>
<% end %>

不工作，没有出现，我搜索但我找不到任何这样的例子。

Answer 1

应该是

<% region.each do |item| %>
  <%= item[:count] %>
  <%= item[:label] %>
  <br>
<% end %>

它实际上不是key，它是数组的对象或项目。

Answer 2

这样做

region = [{:count=>274, :label=>"Minas Gerais"}, {:count=>300, :label=>"São Paulo"}, {:count=>73, :label=>"Rio de Janeiro"}, {:count=>11, :label=>"Espírito Santo"}, {:count=>41, :label=>"Paraná"}, {:count=>70, :label=>"Santa Catarina"}, {:count=>81, :label=>"Rio Grande do Sul"}, {:count=>23, :label=>"Bahia"}, {:count=>3, :label=>"Alagoas"}, {:count=>8, :label=>"Amazonas"}, {:count=>1, :label=>"Amapá"}, {:count=>24, :label=>"Ceará"}, {:count=>62, :label=>"Distrito Federal"}, {:count=>35, :label=>"Goiás"}, {:count=>2, :label=>"Maranhão"}, {:count=>7, :label=>"Mato Grosso do Sul"}, {:count=>6, :label=>"Mato Grosso"}, {:count=>11, :label=>"Pará"}, {:count=>11, :label=>"Paraíba"}, {:count=>29, :label=>"Pernambuco"}, {:count=>1, :label=>"Piauí"}, {:count=>6, :label=>"Rio Grande do Norte"}, {:count=>1, :label=>"Roraima"}, {:count=>4, :label=>"Sergipe"}, {:count=>2, :label=>"Tocantins"}] 

<% region.each do |hash| %>
  <%= hash[:count] %><br>
  <%= hash[:label] %>
<% end %>

使用符号在哈希内打印值

2 个答案: