From: Ricardo Wurmus <rekado@elephly.net>
To: swedebugia@riseup.net
Cc: guix-devel <guix-devel@gnu.org>,
guix-devel-bounces+swedebugia=riseup.net@gnu.org
Subject: Re: Trying to fix an error in the pypi-importer
Date: Sun, 03 Jan 2016 19:47:06 +0100 [thread overview]
Message-ID: <8737uelcut.fsf@elephly.net> (raw)
In-Reply-To: <257e9ac376ee2c97785c0e63715ed38c@riseup.net>
> So removing the (else -> to a comment and adjusting the parentheses did
> not work.
>
> Could somebody point me to relevant documentation about how to write
> conditional statements in guile?
In Scheme a conditional statement just looks like this:
(if condition
expression-a
expression-b)
If the condition evaluates to “#t” then “expression-a” is evaluated.
Otherwise “expression-b” is evaluated. “expression-a” and
“expression-b” can be something more complicated, too:
(if (zero? number)
;; "then" ...
(let ((name "swedebugia"))
(format #t "The number was zero, ~a.\n" name))
;; "else" ...
(begin
(display "The number was not zero.")
(display "I’m not done yet.")
(display "Well, now I am.")))
Chapter 3 of the Guile info manual contains a useful introduction to
Scheme.
~~ Ricardo
next prev parent reply other threads:[~2016-01-03 18:47 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-30 19:53 Trying to fix an error in the pypi-importer swedebugia
[not found] ` <56844BF3.10701@uq.edu.au>
2015-12-30 21:27 ` Ben Woodcroft
2015-12-30 22:00 ` Cyril Roelandt
2016-01-01 18:10 ` swedebugia
2016-01-02 17:10 ` swedebugia
2016-01-02 18:06 ` How to test changes to guix locally? (Was: Re: Trying to fix an error in the pypi-importer) swedebugia
2016-01-02 18:58 ` Ricardo Wurmus
2016-01-02 18:26 ` Trying to fix an error in the pypi-importer Erik Edrosa
2016-01-03 14:09 ` Ludovic Courtès
2016-01-03 16:29 ` swedebugia
2016-01-03 18:47 ` Ricardo Wurmus [this message]
2015-12-31 11:22 ` Efraim Flashner
2016-01-01 18:15 ` swedebugia
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