From: "Bart Schaefer" <schaefer@candle.brasslantern.com>
To: jarausch@igpm.rwth-aachen.de, zsh-users@sunsite.dk
Subject: Re: pop - is there a more elegant solution
Date: Thu, 28 Jun 2001 08:23:48 +0000 [thread overview]
Message-ID: <1010628082349.ZM6944@candle.brasslantern.com> (raw)
In-Reply-To: <200106280801.KAA63855@numa1.igpm.rwth-aachen.de>
On Jun 28, 10:01am, jarausch@igpm.rwth-aachen.de wrote:
}
} is there a more elegant (less cryptic) solution to
} # emulate Perl's pop function
Depends on what you intend by emulating it. Functions in Bourne-like
shell languages don't return values like functions in perl, so there
isn't anything well-defined to do with the popped value.
The fastest way to simply discard the last positional parameter is
argv[-1]=()
(which of course only works in zsh). So if what you want to do is to
store that positional parameter in $last and then discard it,
last=$argv[-1]
argv[-1]=()
is about as un-cryptic as you're going to get.
} #!/bin/zsh
} # get the last parameter and shorten the list
} echo $@
} last=$[-1]
You must mean $@[-1]. $[-1] is just -1. But if you know about $@[-1],
then ...
} # shorten the parameter array
} set $@[0,$[-1+$#]]
... you should know that $@[1,-2] works as well. (You don't index from
zero unless the ksh_arrays option is set.)
Aside to zsh-workers: A weird thing about `setopt ksharrays' is that
${@[0]} is $1. Does ksh really work that way?
--
Bart Schaefer Brass Lantern Enterprises
http://www.well.com/user/barts http://www.brasslantern.com
Zsh: http://www.zsh.org | PHPerl Project: http://phperl.sourceforge.net
prev parent reply other threads:[~2001-06-28 8:28 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-06-28 8:01 jarausch
2001-06-28 8:04 ` Sven Wischnowsky
2001-06-28 8:23 ` Bart Schaefer [this message]
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