From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <zsh-workers-return-30556-mason-zsh=primenet.com.au@zsh.org>
Received: (qmail 23757 invoked by alias); 1 Jul 2012 22:30:22 -0000
Mailing-List: contact zsh-workers-help@zsh.org; run by ezmlm
Precedence: bulk
X-No-Archive: yes
List-Id: Zsh Workers List <zsh-workers.zsh.org>
List-Post: <mailto:zsh-workers@zsh.org>
List-Help: <mailto:zsh-workers-help@zsh.org>
X-Seq: 30556
Received: (qmail 15299 invoked from network); 1 Jul 2012 22:30:20 -0000
X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on f.primenet.com.au
X-Spam-Level: 
X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_NONE
	autolearn=ham version=3.3.2
Received-SPF: none (ns1.primenet.com.au: domain at closedmail.com does not designate permitted sender hosts)
From: Bart Schaefer <schaefer@brasslantern.com>
Message-id: <120701152908.ZM28654@torch.brasslantern.com>
Date: Sun, 01 Jul 2012 15:29:08 -0700
In-reply-to: <20120701191526.50e2cf7d@pws-pc.ntlworld.com>
Comments: In reply to Peter Stephenson <p.w.stephenson@ntlworld.com>
 "Re: PATCH Re: let unset array element remove compatible with bash" (Jul  1,
 7:15pm)
References:
 <CAPg-njyehwyETKY4KGdFV8u_ZwkMku-G9xVi7d7PpU9rZhdPDA@mail.gmail.com>
	<120221210106.ZM13374@torch.brasslantern.com>
	<20120222095248.1ea8140b@pwslap01u.europe.root.pri>
	<120222092827.ZM24425@torch.brasslantern.com>
	<20120222201939.53899980@pws-pc.ntlworld.com>
	<120701095354.ZM28458@torch.brasslantern.com>
	<20120701191526.50e2cf7d@pws-pc.ntlworld.com>
X-Mailer: OpenZMail Classic (0.9.2 24April2005)
To: <zsh-workers@zsh.org>
Subject: Re: PATCH Re: let unset array element remove compatible with bash
Cc: Daniel Lin <dlin.tw@gmail.com>
MIME-version: 1.0
Content-type: text/plain; charset=us-ascii

On Jul 1,  7:15pm, Peter Stephenson wrote:
} Subject: Re: PATCH Re: let unset array element remove compatible with bash
}
} On Sun, 01 Jul 2012 09:53:54 -0700
} Bart Schaefer <schaefer@brasslantern.com> wrote:
} > So the patch below makes
} > 
} >     noglob unset foo[x]
} > 
} > work properly.  If x is an existing index (or valid slice), it is cut
} > from the array as if by foo[x]=().
} 
} Do you mean that?

For reference, the original question about this was users/16778, in
which Daniel wrote:

>  $unset var[2] ###### BASH only delete one element
>  $var[2]=() ###### ZSH only delete one element

so I made unset var[2] work like var[2]=().  On the other hand he also
wrote:

>   $echo "${#var[@]} ${#var[1]} ${#var[2]} ${#var[3]}"
>   2 4 0 14

so he is expecting var[2] to become an empty element that is not counted
as part of the array, which zsh has no way to represent internally.