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Date: Mon, 6 Mar 2017 16:21:08 +0000
From: Daniel Shahaf <d.s@daniel.shahaf.name>
To: Sebastian Gniazdowski <psprint3@fastmail.com>
Cc: zsh-users@zsh.org
Subject: Re: Writing element number into element, of array
Message-ID: <20170306162108.GA5574@fujitsu.shahaf.local2>
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Sebastian Gniazdowski wrote on Mon, Mar 06, 2017 at 07:07:38 -0800:
> # echo ${arr[@]//(#b)(((*)-LINE-(*))|(*))/$match[3]$(( mend[2] != -1 ?  ++ line : ( ++line, 0 ) ))$match[4]$match[5]}

You could probably slap a ${foo:/0/} around the $((…)) (see
${name:/pattern/repl} in zshexpn(1)), but personally, I wouldn't write
it as a one-liner in the first place, for readability.