From: Stephane Chazelas <stephane_chazelas@yahoo.fr>
To: Thorsten Kampe <thorsten@thorstenkampe.de>
Cc: zsh-users@zsh.org
Subject: Re: Test if parameter is set
Date: Tue, 19 Apr 2011 18:22:48 +0100 [thread overview]
Message-ID: <20110419172248.GA6867@yahoo.fr> (raw)
In-Reply-To: <iokedv$c96$1@dough.gmane.org>
2011-04-19 18:48:57 +0200, Thorsten Kampe:
> Hi,
>
> how can I test if a parameter is set?
>
> Like in...
>
> if $VAR_IS_SET; then
> print Variable is set
> else
> print Variable is not set
> fi
[...]
if (($+VAR))
or portably:
if [ -n "${VAR+x}" ]
--
Stephane
next prev parent reply other threads:[~2011-04-19 17:29 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-19 16:48 Thorsten Kampe
2011-04-19 17:19 ` Frank Terbeck
2011-04-19 17:22 ` Stephane Chazelas [this message]
2011-04-19 17:26 ` Peter Stephenson
2011-04-19 17:32 ` Peter Stephenson
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