[plt-scheme] Lambda in a list... am I doing something wrong?

Hi,

If I am not wrong, cdr returns a list. So when you have ((cdr (car commands))), it will give you ((list your-lambda)). So if you want just your function, try ((car (cdr (car commands)))). You might get your desired result ("test"). 

Hari

----- Original Message -----
From: "Jon Rafkind" <rafkind at cs.utah.edu>
To: "Timothy McDowell" <tmcdowell at gmail.com>
Cc: plt-scheme at list.cs.brown.edu
Sent: Monday, October 19, 2009 7:43:30 PM GMT -05:00 US/Canada Eastern
Subject: Re: [plt-scheme] Lambda in a list... am I doing something wrong?

Timothy McDowell wrote:
> I'm trying to write a little interactive fiction, and I have a setup like
> this:
> (define commands
> '(
> ("look" (lambda () (display "test")))))
>
>   

Try (define commands (list (list "look" (lambda () (display "test")))))

> The response I get from trying ((cdr (car commands))):
> procedure application: expected procedure, given: ((lambda () (display
> "test"))) (no arguments)
>
> Can someone explain to me what I am doing wrong?
>
> --  Thanks,
> --Timothy.
>
>   
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