Show raw HTML data and ruby variable.
concat
this key word is the same as echo
in PHP.
There is a array in the ruby controller that will be sent to a view.
@list = [2, 3, 5, 2, 3, 10, 6, 1]
There three ways to do it!
<div>
<% @list.each { |n|
concat raw "<p>"
concat n
concat raw "</p>"
} %>
</div>
<div>
<% @list.each do |n| %>
<p><%= n %></p>
<% end %>
</div>
<div>
<% @list.each do |n| %>
<-- This tag is provided by ruby's view helper. -->
<%= tag_p n %>
<% end %>
</div>
Through this three we can make a good practice.