From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <zsh-users-return-24484-ml=inbox.vuxu.org@zsh.org>
X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on inbox.vuxu.org
X-Spam-Level: 
X-Spam-Status: No, score=-1.0 required=5.0 tests=DKIM_ADSP_CUSTOM_MED,
	FREEMAIL_FROM,MAILING_LIST_MULTI,NORMAL_HTTP_TO_IP,NUMERIC_HTTP_ADDR,
	RCVD_IN_DNSWL_NONE autolearn=ham autolearn_force=no version=3.4.2
Received: from primenet.com.au (ns1.primenet.com.au [203.24.36.2])
	by inbox.vuxu.org (OpenSMTPD) with ESMTP id 233a04ea
	for <ml@inbox.vuxu.org>;
	Sun, 1 Dec 2019 20:08:06 +0000 (UTC)
Received: (qmail 14699 invoked by alias); 1 Dec 2019 20:07:58 -0000
Mailing-List: contact zsh-users-help@zsh.org; run by ezmlm
Precedence: bulk
X-No-Archive: yes
List-Id: Zsh Users List <zsh-users.zsh.org>
List-Post: <mailto:zsh-users@zsh.org>
List-Help: <mailto:zsh-users-help@zsh.org>
List-Unsubscribe: <mailto:zsh-users-unsubscribe@zsh.org>
X-Seq: 24484
Received: (qmail 15155 invoked by uid 1010); 1 Dec 2019 20:07:58 -0000
X-Qmail-Scanner-Diagnostics: from mail-wr1-f48.google.com by f.primenet.com.au (envelope-from <stephane.chazelas@gmail.com>, uid 7791) with qmail-scanner-2.11 
 (clamdscan: 0.102.0/25649. spamassassin: 3.4.2.  
 Clear:RC:0(209.85.221.48):SA:0(-0.8/5.0):. 
 Processed in 1.718363 secs); 01 Dec 2019 20:07:58 -0000
X-Envelope-From: stephane.chazelas@gmail.com
X-Qmail-Scanner-Mime-Attachments: |
X-Qmail-Scanner-Zip-Files: |
Received-SPF: pass (ns1.primenet.com.au: SPF record at _netblocks.google.com designates 209.85.221.48 as permitted sender)
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
        d=1e100.net; s=20161025;
        h=x-gm-message-state:date:from:to:subject:message-id:mail-followup-to
         :references:mime-version:content-disposition:in-reply-to:user-agent;
        bh=qQihB5uDQmtbtz0J5vQsLvRNlhDc+f4DfWcHO9/A1tE=;
        b=pk33Sc2QuZvz5R6LXijc5UCh3uS+0v63lq0J7WaLAAvBNmgMeCNLSgiO7LesnRtbDE
         8HDNFw/7JmrHbp35jaG8jXAiXI+xolhGFAL/LRuGu6L7wvBBvD/R7OeIsxqpqRQ0DIF+
         mrLNj1YdAyDpgSh4mXhTIaoxl/rXTaIRiWeuR/oPtfBOHz0AINikyMLOh1MsIzQdk7x6
         ediRu+g1LA4m+jywNoN5eUCrfPQ/3xVr1dL0//RH5Kr5qdiOiyHKYJiJH9+USk9W0jXQ
         KbJvaT3dwHZxT+5U/PYigqWa7ieI7fBYKVm755sF0I3WirbBXf6CF2tX2e8dbYI+BZWA
         3qVA==
X-Gm-Message-State: APjAAAWACjv8ihi+m/ODEOOZUFAOW/yyXGY1nYZP0ZQ1oEz3Xw3QpvD2
	Y2dGeHqGQ1CWir8GrL8SgaGTOri5
X-Google-Smtp-Source: APXvYqyl7NcTQtigzhI4SyMcYLOYR5mDMbu3rKohHi0NEfyUXz+8LisO9CBuHxIIKu4d6xKmLZJ+Lg==
X-Received: by 2002:a5d:4e8c:: with SMTP id e12mr49739349wru.109.1575230841520;
        Sun, 01 Dec 2019 12:07:21 -0800 (PST)
Date: Sun, 1 Dec 2019 20:07:19 +0000
From: Stephane Chazelas <stephane.chazelas@gmail.com>
To: zsh-users@zsh.org
Subject: Re: shuffle array
Message-ID: <20191201200719.anzbs27c7phgdnmm@chaz.gmail.com>
Mail-Followup-To: zsh-users@zsh.org
References: <867e3jxtao.fsf@zoho.eu>
 <20191129064215.GA14095@prometheus.u-strasbg.fr>
 <8636e7w0w9.fsf__36104.0529723809$1575015640$gmane$org@zoho.eu>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <8636e7w0w9.fsf__36104.0529723809$1575015640$gmane$org@zoho.eu>
User-Agent: NeoMutt/20180716

2019-11-29 09:19:02 +0100, Emanuel Berg:
> Marc Chantreux wrote:
> 
> > print -l $array |shuff|read -A array
> 
> *shuf
> 
> The first two steps work

The first two steps (with shuf instead of shuff)  only work if
array elements don't contain backslashes nor newline and are not
empty and the first one doesn't start with "-".

> but the result array
> seems to have only one element?
[...]

Yes, that's not what read -A does.

You could do things like:

array=("${(0@)$(printf '%s\0' "$array[@]" | shuf -z)[1,-2]}")

But that would still not work for array elements containing
NULs.

-- 
Stephane