From: Stephane Chazelas <stephane@chazelas.org>
To: Grant Taylor <gtaylor@tnetconsulting.net>
Cc: zsh-users@zsh.org
Subject: Re: alias with a parameter
Date: Wed, 7 Apr 2021 08:05:18 +0100 [thread overview]
Message-ID: <20210407070518.szoet4rxbouwzelm@chazelas.org> (raw)
In-Reply-To: <b9b02825-68f7-b41a-be42-b00b9b252abe@spamtrap.tnetconsulting.net>
2021-04-05 20:47:47 -0600, Grant Taylor:
[...]
> pd() {
> [ -n "${1}" ] && pushd "${1}" || popd;
> }
>
> It's using parameters on a function, just like you're trying to do. It
> works a treat.
>
> Aside: Yes, I'm lazy and don't want to type pushd or popd. Instead, the pd
> function determines which command to run based on if $1 is set or not.
[...]
That function would run popd when pushd fails. It's generally a
bad idea to use this kind of a && b || c in place of proper
if/then/else constructs.
pd() {
if [ "$#" -gt 0 ]; then
pushd "$@"
else
popd
fi
}
Or for the very lazy:
pd()if (($#)){pushd "$@"} else {popd}
--
Stephane
next prev parent reply other threads:[~2021-04-07 7:06 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-05 22:55 dukeofpurl
2021-04-06 0:16 ` lb
2021-04-06 3:40 ` Duke Normandin
2021-04-06 14:42 ` Greg Klanderman
2021-04-06 2:47 ` Grant Taylor
2021-04-07 7:05 ` Stephane Chazelas [this message]
2021-04-07 12:48 ` lb
2021-04-07 12:58 ` Peter Stephenson
2021-04-08 1:06 ` Grant Taylor
2021-04-08 1:25 ` Daniel Shahaf
2021-04-09 2:55 ` Grant Taylor
2021-04-09 22:49 ` Daniel Shahaf
2021-04-10 7:32 ` david rayner
2021-04-10 10:38 ` Marc Chantreux
2021-04-14 11:10 ` zzapper
2021-04-15 18:19 ` Bart Schaefer
2021-04-15 19:56 ` (prefix case terminators?) " Marc Chantreux
2021-04-15 23:52 ` Bart Schaefer
2021-04-16 6:46 ` Marc Chantreux
2021-04-15 20:30 ` Daniel Shahaf
2021-04-16 7:34 ` zapper
2021-04-16 10:12 ` Stephane Chazelas
2021-04-10 16:30 ` Grant Taylor
2021-04-10 16:34 ` Grant Taylor
2021-04-13 11:22 ` Daniel Shahaf
2021-04-07 14:43 ` Daniel Shahaf
2021-04-07 14:54 Duke Normandin
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