From: "David A. Black" <dblack@...>
Date: 2005-09-04T20:25:40+09:00
Subject: Re: params v.s. @params in rails?

Hi --

On Sun, 4 Sep 2005, Barry wrote:

> Both work in my controller class, so I am wondering what's the
> difference and when should each one be used?

To the extent that this is a Rails question, you might want to ask it
in a Rails forum (mailing list or IRC channel).

Meanwhile, the non-Rails-specific answer is that the bareword "params"
is a local variable, while "@params" is an instance variable.  Local
variables are mainly a kind of "scratchpad" or temporary holding area
for data in the current local scope.  Instance variables are unique
per object, rather than per scope, and give your objects a way to
maintain state across different methods and local scopes.


David

-- 
David A. Black
dblack@wobblini.net