[plt-scheme] solution for exercise 11.2.4

could it be right?

(define (depth a-dl)
    (cond
    [(symbol? a-dl) 0]
    [else (list? (first a-dl)) (+ 1 (depth (rest a-dl)))]))


N.B. at the moment I'm away from my Dr.Scheme program...so I cannot run the code above...

----------------------------------------
> CC: plt-scheme at list.cs.brown.edu
> From: matthias at ccs.neu.edu
> Subject: Re: [plt-scheme] solution for exercise 11.2.4
> Date: Mon, 9 Jun 2008 21:10:25 -0400
> To: cr-service at hotmail.it
> 
> 
> Not true. You answered the question already and they are *trivial*  
> question. I just want you to learn to think about what you're doing  
> instead of just following something in a rote manner. Once you know  
> how to think about it, you'll internalize and empower yourself to  
> apply such things in situations where you never expected it.
> 
> Try again. I expect an answer in 10 mins.
> 
> 
> On Jun 9, 2008, at 8:58 PM, carlo ambrogio wrote:
> 
>>
>> ok now i'm stucked...
>> ----------------------------------------
>>> CC: plt-scheme at list.cs.brown.edu
>>> From: matthias at ccs.neu.edu
>>> Subject: Re: [plt-scheme] solution for exercise 11.2.4
>>> Date: Mon, 9 Jun 2008 20:38:29 -0400
>>> To: cr-service at hotmail.it
>>>
>>>
>>> Let me rephrase John's criticism: you jumped the gun and shot  
>>> yourself.
>>>
>>> Just answer the questions that I asked. Not more, not less.
>>>
>>>
>>> On Jun 9, 2008, at 6:53 PM, carlo ambrogio wrote:
>>>
>>>>
>>>> the template could be:
>>>>
>>>> (define (depth a-dl)
>>>>   (cond
>>>>     [(symbol? a-dl) ...]
>>>>     [else ... (first a-dl) ... (depth (rest a-dl)) ...]))
>>>>
>>>> how many clauses does the data def have? (how many clauses must the
>>>> function def have?)
>>>>
>>>> I think 2 (the data can be a symbol or a list)
>>>>
>>>>
>>>>
>>>>
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