红宝石显示二维数组

Question

我正在尝试显示二维数组。 使用以下代码。但是，对于每个数组的第一个下标，我必须编写一个循环。我可以使用外部循环而不是多个循环来做到这一点吗？

  <% tempTickets = subject['permailaddr-addrline1'] %>  
  <% cnt = tempTickets.length %>
  <% tempTickets.each_with_index do |ticket, index| %>
<div>
<tr>
  <td><li class="entity_info"><div><span class="label"><%= subject['memhead-mem-recno'][index] %></span></div></li></td>
  <td><li class="entity_info"><div><span class="label"><%= subject['permailaddr-addresstype'][index] %></span></div></li></td>
  <td><li class="entity_info"><div><span class="label"><%= subject['permailaddr-addrline1'][index] %></span></div></li></td>
  <td><li class="entity_info"><div><span class="label"><%= subject['permailaddr-state'][index] %></span></div></li></td>
  <td><li class="entity_info"><div><span class="label"><%= subject['permailaddr-suburb'][index] %></span></div></li></td>
  <td><li class="entity_info"><div><span class="label"><%= subject['permailaddr-postcode'][index] %></span></div></li></td>
  <td><li class="entity_info"><div><span class="label"><%= subject['permailaddr-countrycode'][index] %></span></div></li></td>
</tr>
</div>
  <% end %>
  <% tempTickets = subject['perresiaddr-addrline1'] %>  
  <% cnt = tempTickets.length %>
  <% tempTickets.each_with_index do |ticket, index| %>
<div>
<tr>
  <td><li class="entity_info"><div><span class="label"><%= subject['memhead-mem-recno'][index] %></span></div></li></td>
  <td><li class="entity_info"><div><span class="label"><%= subject['perresiaddr-addresstype'][index] %></span></div></li></td>
  <td><li class="entity_info"><div><span class="label"><%= subject['perresiaddr-addrline1'][index] %></span></div></li></td>
  <td><li class="entity_info"><div><span class="label"><%= subject['perresiaddr-state'][index] %></span></div></li></td>
  <td><li class="entity_info"><div><span class="label"><%= subject['perresiaddr-suburb'][index] %></span></div></li></td>
  <td><li class="entity_info"><div><span class="label"><%= subject['perresiaddr-postcode'][index] %></span></div></li></td>
  <td><li class="entity_info"><div><span class="label"><%= subject['perresiaddr-countrycode'][index] %></span></div></li></td>
</tr>
</div>
  <% end %>

Answer 1

ticketLists = [ subject['permailaddr-addrline1'], subject['perresiaddr-addrline1'] ]
ticketLists.each do |tempTickets|:

然后，包括要为每个tempTickets数组执行的代码。

Answer 2

这样的事情应该有效。

<% ['permailaddr', 'perresiaddr'].each do |prefix| %>
  <% tempTickets.each_with_index do |ticket, index| %>
    <div>
    <tr>
      <td><li class="entity_info"><div><span class="label"><%= subject['memhead-mem-recno'][index] %></span></div></li></td>
      <% ['addresstype', 'addrline1', 'state', 'suburb', 'postcode', 'countrycode'].each do |field_name| %>
        <td><li class="entity_info"><div><span class="label"><%= subject["#{prefix}-#{field_name}"][index] %></span></div></li></td>
      <% end %>
    </tr>
    </div>
  <% end %>
<% end %>

请注意，我还将字段名称（['addresstype', 'addrline1', 'state', 'suburb', 'postcode', 'countrycode']）拉出到数组中并循环访问它们，以保存一些重复的html - 但如果您不想要它，则不需要这样做。

Answer 3

尝试像，

 2.times do |i|
    ...
   <%= subject['#{ i==0 ? "permailaddr" : "perresiaddr"}-addresstype'][index] %>
    ...
 end