On 21 Jul 2010, at 01:56, Abder-Rahman Ali wrote:

> In the "Head First Rails" book, it mentions that "h" in <%=h...%> is a
> helper method.
> 
> Can someone describe what that means? And, when should I use <%=h...%>?
> Is it when I want the result to be displayed on my view for example?

h is short for html_escape. You're probably end up using it nearly every time 
you display user entered data (or you may be at the risk of xss attacks). From 
rails 2.3.8 there's a different way of handling this - strings have a notion of 
whether they are safe or not

Fred
> 
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