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Jochen Schmidt  
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 More options Jun 22 2000, 3:00 am
Newsgroups: comp.lang.lisp
From: Jochen Schmidt <kid_stea...@gmx.de>
Date: 2000/06/22
Subject: Re: Newbie asking for help
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The Glauber wrote:
> ;; count number of lines in file key.html
> (with-open-file (ifile "key.html" :direction :input)
>                 (setf nlines 0)
>                 (loop
>                   (if (read-line ifile nil)
>                     (setf nlines (+ 1 nlines))
>                     (return nlines))))

> It doesn't work (it just hangs, so i think it's stuck in the loop). I
> thought it would read lines until the end of the file, when the read-
> line would return nil, and that would trigger the second form inside
> the if (a return, to get out of the loop).

> I'm sorry for posting something so stupid, but why doesn't this work?

It works for me in cmucl (warning on the nondefined variable "nlines")
It works in Allegro Trial Edition 5.0.1 for Linux (without warnings)
It works in Lispworks Personal Edition 4.1.18 (without warnings)
But it seems NOT to work with clisp !!! (as the former author noted, it
blocks)

have not looked further into it, but I found this interesting enough to
post it.

--
sincerely Yours,
Jochen Schmidt
j...@dataheaven.de
http://www.dataheaven.de


 
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