From: Tim X <timx@nospam.dev.null>
To: help-gnu-emacs@gnu.org
Subject: Re: How come I keep getting nil on point-max?
Date: Sun, 29 Apr 2007 16:46:18 +1000 [thread overview]
Message-ID: <873b2jfzk5.fsf@lion.rapttech.com.au> (raw)
In-Reply-To: 1177786810.445099.316330@n76g2000hsh.googlegroups.com
grocery_stocker <cdalten@gmail.com> writes:
> On Apr 28, 11:42 am, Ralf Angeli <dev.n...@caeruleus.net> wrote:
>> * grocery stocker (2007-04-28) writes:
>>
>> > However, when I do
>> > (let (start (point-max)))
>>
>> > I get:
>> > nil
>>
>> > And when I do
>> > (let (start (point-max))
>> > (message "The value is: %d" start))
>>
>> (let ((start (point-max))) ...
>>
>> --
>
> Okay, one last question. When I modify let to do the following:
> (let ((start (point-min))
> ((end (point-max)))
>
> I get the following:
> Debugger entered--Lisp error: (invalid-function (end (point-max)))
> ((end (point-max)))
> eval(((end (point-max))))
> eval-last-sexp-1(nil)
> eval-last-sexp(nil)
> * call-interactively(eval-last-sexp)
>
> I don't get this. I thought I could assign multiple variables to let.
>
I think you need to use better indentation and re-read the elisp manual a bit
as your getting the syntax wrong.
,----[ C-h f let RET ]
| let is a special form in `C source code'.
| (let VARLIST BODY...)
|
| Bind variables according to VARLIST then eval BODY.
| The value of the last form in BODY is returned.
| Each element of VARLIST is a symbol (which is bound to nil)
| or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM).
| All the VALUEFORMs are evalled before any symbols are bound.
|
| [back]
`----
so you need
(let (varlist) body)
(let (start end)
(message "The start is %d and end is %d" start end))
but you want to assign values when the variables are created, so you need
(let ((start (point-min))
(end (point-max)))
(message "The start is %d and the end is %d" start end))
HTH
Tim
--
tcross (at) rapttech dot com dot au
next prev parent reply other threads:[~2007-04-29 6:46 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-28 18:31 How come I keep getting nil on point-max? grocery_stocker
2007-04-28 18:42 ` Ralf Angeli
2007-04-28 18:52 ` grocery_stocker
2007-04-28 19:03 ` Ralf Angeli
2007-04-28 20:52 ` Pascal Bourguignon
2007-04-28 19:00 ` grocery_stocker
2007-04-28 19:16 ` Joost Kremers
2007-04-29 6:46 ` Tim X [this message]
2007-04-28 19:13 ` Denis Bueno
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