軌道截斷錯誤的參數數目（3 2）

Question

美好的一天，我在查看這個代碼，它會產生

wrong number of arguments (3 for 2) 
Extracted source (around line #7): 

4:  <h3 class="<%= cycle('color_1', 'color_2') %> "> 
5:  <%= link_to sanitize(article.title),article %> 
6:  </h3> 
7:  <% output_text = truncate(article.text, 40, "...") %> 
8:  <span><%= sanitize(output_text) %> 
9:  <%= link_to ' ... full ->', article %></span> 
10:  <span style="display: none"> 

這就是我檢查截斷http://paulsturgess.co.uk/articles/37-how-to-truncate-text-in-ruby-on-rails

如果我寫

<% output_text = truncate(article.text, 40) %> 

我得到

undefined method `reverse_merge!' for 40:Fixnum 

Answer 1

<% output_text = truncate(article.text, 40, "...") %>

應該

<% output_text = truncate(article.text, :length => 40, :omission => '...') %>