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From: sergio <sergio@outerface.net>
To: zsh-users@zsh.org
Subject: zip arrays exclude empty elements
Date: Sat, 5 Sep 2020 01:03:47 +0300
Message-ID: <0b12bc3e-6d96-db88-8e6c-2a3e1ca85c84@outerface.net> (raw)

I have an input string in form of 'A[-][B]' that I'd like to translate 
as follows:

1: A-B    ->  -a A -b B
2: A-     ->  -a A
3: A      ->  -a A
4: -B     ->  -b B
5: empty  ->  empty

The solution I found:
echo ${tmp[1]:+-a $tmp[1]} ${tmp[2]:+-b $tmp[2]}

But possible there is clearer and simpler solution, like

o=(-a -b)
echo ${o:^tmp}

or even
echo ${(-a -b):^${(@s.-.)crop}}


             reply	other threads:[~2020-09-04 22:04 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-04 22:03 sergio [this message]
2020-09-06  0:21 ` Bart Schaefer

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