From: Brian Candler <b.candler@...>
Date: 2009-01-22T19:02:15+09:00
Subject: Re: How to change ruby's global  variable through onclick ev

Stefan Rusterholz wrote:
> On another note: you do NOT want a global variable there. A global will 
> be used not just for that single user but for all happening to be served 
> by the same instance of ruby.

And in most Rails deployments, there are multiple processes, so a global 
variable changed in one will not affect another.

You probably want to change state in the *session*, which is accessible 
to any process handling data on behalf of the same user.

  session[:foo] = "bar"

(By default the session is stored in a cookie, so the total size is 
limited to 4K. If you need to store more than this, select a different 
session store model)
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