in-ram lists

[Damir Horvat]

On Fri, Mar 24, 2006 at 01:48:06PM +0100, R?mi H?rilier wrote:

> Don't forget to get the value returned by queue:in(Item,Queue).
> 
> 1> Q1 = queue:new().
> {[],[]}
> 2> Q2 = queue:in("item1", Q1).
> {["item1"],[]}
> 3> Q3 = queue:in("item2", Q2).
> {["item2"],["item1"]}
> 4>

Ok, I get this. But what bothers me is, how to do this in functional
way?

I'd like to have this queue accessible in ram. I'd like to have two
functions (push, shift) which adds new element to the queue and takes
one off. I don't want to worry about naming variables to capture return
values.

For example:

push (element, queue) # puts element on the tail of the queue
shift (queue) # gets first element from the queue.

That's all I need. Is this doable in erlang?