From: Peter Stephenson <p.w.stephenson@ntlworld.com>
To: zsh-users@zsh.org
Subject: Re: {fd}< and compound commands
Date: Wed, 14 Sep 2011 22:05:35 +0100 [thread overview]
Message-ID: <201109142105.p8EL5ZNf008882@pws-pc.ntlworld.com> (raw)
In-Reply-To: Message from Stephane Chazelas <stephane_chazelas@yahoo.fr> of "Wed, 14 Sep 2011 20:31:41 BST." <20110914193141.GB7325@yahoo.fr>
Stephane Chazelas wrote:
> 2011-09-14 20:06:01 +0100, Peter Stephenson:
> [...]
> > {
> > exec {fd}<file
> >
> > while read; do
> > ...
> > done <&$fd
> > } always {
> > exec {fd}<&-
> > }
>
> Thanks Peter,
>
> Why the "always" here?
That's extended { ... } syntax to ensure the clean-up gets executed even
if there's an error in the main block. In fact, if I'd known Ruby when
I wrote it, I'd probably have called it "ensure" instead.
--
Peter Stephenson <p.w.stephenson@ntlworld.com>
Web page now at http://homepage.ntlworld.com/p.w.stephenson/
next prev parent reply other threads:[~2011-09-14 21:05 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-14 17:21 Stephane Chazelas
2011-09-14 17:36 ` Mikael Magnusson
2011-09-14 19:06 ` Peter Stephenson
2011-09-14 19:31 ` Stephane Chazelas
2011-09-14 21:05 ` Peter Stephenson [this message]
2011-09-15 12:58 ` Stephane Chazelas
2011-09-15 13:09 ` Peter Stephenson
2011-09-15 13:22 ` Chet Ramey
2011-09-15 14:21 ` Stephane Chazelas
2011-09-17 12:21 ` Stephane Chazelas
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