這兩個有什麼不同?

<% ... %>

執行後印出內容，包括你原始碼的空白與換行。

<% ... -%>

除了印出內容外，會削掉多餘的換行。

拿個例子來解釋:
[ruby]
<% 2.times do %>

< li > hello world

<% end %>
[/ruby]
輸出的html結果是:
—
空一行
hello world
空一行
空一行
hello world
空一行
空一行
—

改成<% 2.times do -%>
結果是:
hello world
hello world

This entry was posted on Tuesday, August 21st, 2007 at 6:44 pm and is filed under Ruby on Rails. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.