From: Rusi <rustompmody@gmail.com>
To: help-gnu-emacs@gnu.org
Subject: Re: code listp to determine wich os I'm running on
Date: Wed, 29 Jan 2014 18:27:18 -0800 (PST) [thread overview]
Message-ID: <737dd77e-fbef-4025-ad8a-d0e8b9bb4387@googlegroups.com> (raw)
In-Reply-To: <mailman.13124.1391033590.10748.help-gnu-emacs@gnu.org>
On Thursday, January 30, 2014 3:42:58 AM UTC+5:30, Renato wrote:
> Sorry Emanuel...
> what's wrong?
> (if (string= system-type "gnu/linux")
> (setq percorso-variable "\home\renato\Dropbox\emacs_prof\")
> (message "fatto"))
> (if (string= system-type "windows-nt")
> (setq percorso "c:/doc/Dropbox") ))
> It does,t works... :-(
A very common pattern (in 'normal' languages like C/Java etc) is like this
if cond1
statement1
else if cond2
statement2
else statement3
You could use an if in lisp for this, but many people prefer a cond
(cond (cond1 statement1)
(cond2 statement2)
(t statement3)
)
Look up
M-: (info "(elisp)Conditionals")
for how to write that -- getting the number of parentheses right is tricky for beginners.
Also for other neat shortforms like unless, when etc
next prev parent reply other threads:[~2014-01-30 2:27 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <mailman.13113.1391020728.10748.help-gnu-emacs@gnu.org>
2014-01-29 20:28 ` code listp to determine wich os I'm running on Emanuel Berg
2014-01-29 22:12 ` Renato
2014-01-29 23:26 ` Peter Dyballa
2014-01-30 0:11 ` Stefan Monnier
[not found] ` <mailman.13124.1391033590.10748.help-gnu-emacs@gnu.org>
2014-01-29 22:27 ` Emanuel Berg
2014-01-30 2:27 ` Rusi [this message]
2014-01-30 2:47 ` Rusi
2014-01-29 21:14 ` Pascal J. Bourguignon
2014-01-29 23:52 ` Emanuel Berg
2014-01-30 2:43 ` Rusi
2014-01-30 3:47 ` Stefan Monnier
[not found] ` <mailman.13151.1391053674.10748.help-gnu-emacs@gnu.org>
2014-01-30 4:01 ` Rusi
2014-01-30 12:59 ` Rusi
[not found] <mailman.13331.1391158986.10748.help-gnu-emacs@gnu.org>
2014-01-31 11:57 ` Rusi
2014-01-31 9:03 Renato Pontefice
2014-01-31 13:28 ` Stefan Monnier
2014-01-31 23:01 ` Tassilo Horn
[not found] ` <mailman.13357.1391175021.10748.help-gnu-emacs@gnu.org>
2014-01-31 14:05 ` Rusi
2014-01-31 17:02 ` Renato
[not found] ` <mailman.13385.1391187779.10748.help-gnu-emacs@gnu.org>
2014-01-31 17:15 ` Rusi
2014-01-31 17:32 ` Rusi
-- strict thread matches above, loose matches on Subject: below --
2014-01-31 8:39 Renato Pontefice
2014-01-30 1:55 Louis-Guillaume Gagnon
2014-01-30 1:57 ` Louis-Guillaume Gagnon
2014-01-29 18:41 Renato
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