From: Bart Schaefer <schaefer@brasslantern.com>
To: Sebastian Gniazdowski <psprint@zdharma.org>
Cc: "zsh-workers@zsh.org" <zsh-workers@zsh.org>
Subject: Re: 5.3.1-dev-0 difference in array=( "${(PA@)var_name}" )
Date: Wed, 14 Jun 2017 13:35:47 -0700 [thread overview]
Message-ID: <CAH+w=7aGkJpWqM=2QEz_SgFokwNSxfok7WA2v6Uv=Fw6P3Skcg@mail.gmail.com> (raw)
In-Reply-To: <etPan.59416db1.2eb141f2.8fd5@MacMini.local>
On Wed, Jun 14, 2017 at 10:09 AM, Sebastian Gniazdowski
<psprint@zdharma.org> wrote:
> Hello,
> % zsh-5.3.1
> % var_name="abcdef"; array=( "${(PA@)var_name}" ); echo ${#array}
> 1
The (A) flag doesn't mean anything in this context in 5.3.1, that was
added about 2 months after the 5.3.1 release.
So in the above example ${(P)var_name} returns a scalar and the (@)
flag is also meaningless. In this next example --
> % zsh-5.3.1-dev-0
> % var_name="abcdef"; array=( "${(PA@)var_name}" ); echo ${#array}
> 0
-- the (A) flag does apply , so ${(PA)var_name} is an empty array
rather than an unset scalar, and (@) causes the double-quotes to
resolve to nothing rather than to a quoted empty string, just as
"${emptyarray[@]}" would do.
next prev parent reply other threads:[~2017-06-14 20:36 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-14 17:09 Sebastian Gniazdowski
2017-06-14 20:35 ` Bart Schaefer [this message]
2017-06-15 6:03 ` Sebastian Gniazdowski
2017-06-15 6:10 ` Bart Schaefer
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