From: Peter Stephenson <pws@csr.com>
To: zsh-users@sunsite.dk (Zsh users list)
Subject: Re: field splitting behavior
Date: Wed, 28 Nov 2001 10:30:06 +0000 [thread overview]
Message-ID: <28922.1006943406@csr.com> (raw)
In-Reply-To: "Zefram"'s message of "Tue, 27 Nov 2001 19:21:34 GMT." <20011127192134.I8299@fysh.org>
Zefram wrote:
> Paul Lew wrote:
> >> var='foobar'
> >> echo ${(@)${(s/:/)var}[1]}
> >f
> >
> >So why it did field splitting on each character when there is no
> >separator ':' found? I would expect 'foobar' on the output.
>
> The result of the splitting is a single word "foobar", as you expect.
> This is then treated as a scalar, not an array, and so the [1] extracts
> the first character, instead of the first element. The (@) doesn't do
> what you think it does (it only has an effect where double quotes are
> used). I don't see any easy way to force the result of a ${(s...)...}
> to be treated as an array, so I'll have to leave that to the expansion
> wizards.
I can only think of the gross hack
print ${${(s/:/):-${var}:rubbish}[1]}
which extends the string to make sure it produces an array. It's somewhat
inconsistent that you sometimes get a scalar and sometimes an array.
--
Peter Stephenson <pws@csr.com> Software Engineer
CSR Ltd., Science Park, Milton Road,
Cambridge, CB4 0WH, UK Tel: +44 (0)1223 392070
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prev parent reply other threads:[~2001-11-28 10:31 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-11-27 19:04 Paul Lew - remove nospam when reply
2001-11-27 19:21 ` Zefram
2001-11-28 10:30 ` Peter Stephenson [this message]
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