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Kaz Kylheku  
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 More options Sep 17 2012, 2:27 pm
Newsgroups: comp.lang.lisp
From: Kaz Kylheku <k...@kylheku.com>
Date: Mon, 17 Sep 2012 18:27:17 +0000 (UTC)
Local: Mon, Sep 17 2012 2:27 pm
Subject: Re: new to lisp, need help.
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On 2012-09-17, mchukh...@gmail.com <mchukh...@gmail.com> wrote:

> Assumptions:
> You can assume the following:
> 1. AND is the only word that can create compound sentences.
> 2. Any time that AND is used it is a compound sentence.
> 3. A compound sentence can only have 1 AND in it.

> Sample Output:
> Here is sample output for the function.
> Break 10 [14]> (BREAK_COMP '(I like you))
> ((I LIKE YOU))
> Break 10 [14]> (BREAK_COMP '(I like you and you like me))
> ((I LIKE YOU) (YOU LIKE ME))

(defun break-comp (list)
  (let* ((and-clause (member 'and list))
         (main-clause (ldiff list and-clause)))
    `(,main-clause ,@(if and-clause `(,(cdr and-clause))))))

Uncool version, without backquote notation:

(defun break-comp (list)
  (let* ((and-clause (member 'and list))
         (main-clause (ldiff list and-clause)))
     (if and-clause
       (list main-clause and-clause)
       (list main-clause))))


 
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