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Date: Fri, 29 Nov 2019 13:38:24 +0000
From: Clint Adams <clint@zsh.org>
To: zsh-users@zsh.org
Subject: Re: shuffle array
Message-ID: <20191129133824.GA25621@scru.org>
References: <867e3jxtao.fsf@zoho.eu>
 <20191129064215.GA14095@prometheus.u-strasbg.fr>
 <8636e7w0w9.fsf@zoho.eu>
 <20191129084304.GA20296@prometheus.u-strasbg.fr>
 <86r21rukvv.fsf@zoho.eu>
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User-Agent: Mutt/1.10.1 (2018-07-13)

On Fri, Nov 29, 2019 at 09:50:12AM +0100, Emanuel Berg wrote:
> $ local -a arg_array
> $ arg_array=(1 2 3 a b c)
> $ print -l $arg_array | shuf | read -A new_array
> $ echo $new_array
> 1
> 
> doesn't work, just one element...

`read` only reads one line.

I don't remember where this came from, but I've been using

shuffle() {
  declare -A h
  local +h -Z 5 RANDOM=$EPOCHSECONDS
  integer i
  for ((i=1; i <= $#; ++i)) { h[$i.$RANDOM]=$argv[i] }
  reply=( $h )
}