From: Eric Abrahamsen <eric@ericabrahamsen.net>
To: Hongyi Zhao <hongyi.zhao@gmail.com>
Cc: help-gnu-emacs <help-gnu-emacs@gnu.org>
Subject: Re: (unless ...) vs (when (not ...))
Date: Fri, 16 Jul 2021 16:12:19 -0700 [thread overview]
Message-ID: <87mtqlua3w.fsf@ericabrahamsen.net> (raw)
In-Reply-To: <CAGP6POJ2y3fo=cNzM0=RZbS788mfMiVRJ3xNnHe+BCQgaVnzrA@mail.gmail.com> (Hongyi Zhao's message of "Sat, 17 Jul 2021 06:42:40 +0800")
Hongyi Zhao <hongyi.zhao@gmail.com> writes:
> Should I use (unless ...) or (when (not ...))? Which one is preferable?
In terms of compilation, they both turn into `if' statements, so there's
no real difference there. Personally I find that, when I'm "reading" the
code out loud in my head, one approach will sound more natural than the
other, which can make things a little quicker to parse mentally. But it
really depends on what the condition is and how it's tested.
next prev parent reply other threads:[~2021-07-16 23:12 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-16 22:42 (unless ...) vs (when (not ...)) Hongyi Zhao
2021-07-16 23:12 ` Eric Abrahamsen [this message]
2021-07-17 17:52 ` Emanuel Berg via Users list for the GNU Emacs text editor
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