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From: Sebastian Gniazdowski <sgniazdowski@gmail.com>
To: "Jesper Nygårds" <jesper.nygards@gmail.com>
Cc: Zsh Users <zsh-users@zsh.org>
Subject: Re: Filtering array on index
Date: Sun, 8 Sep 2019 10:59:03 +0200
Message-ID: <CAKc7PVALeSnssi8F2FxS+oOAfv0Hg6rnywiXU2buZ+k5joYTZw@mail.gmail.com> (raw)
In-Reply-To: <CAKc7PVCHY-EjwtkYRye4peepc_kOnKyvoMyZBVEf7eK3+W128Q@mail.gmail.com>

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23 July 2019, 09:42 Sebastian Gniazdowski <sgniazdowski@gmail.com> wrote:

> Turns out the expression can be simpler because the math mode within
> array's index is implicit, so:
>
>   idx=0; olen=$#a+1; a=( ${a[@]/(#m)*/$a[ ++idx % 2 ? olen : idx ]} )
>

The expression can be even simpler if (valid in Zsh, just resolving to
empty element when no ksharrays) index 0 will be used:

idx=0; a=( ${a[@]/(#m)*/$a[ ++idx%2 ? 0 : idx ]} )

      parent reply index

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-10-25 11:29 Jesper Nygårds
2018-10-25 18:17 ` Mikael Magnusson
2018-10-25 18:55   ` Jesper Nygårds
2018-10-25 19:42   ` Daniel Shahaf
2018-10-25 20:21 ` Bart Schaefer
2018-10-25 20:42   ` dana
2018-10-26  4:14     ` Jesper Nygårds
2018-10-26  7:59       ` Jesper Nygårds
2018-10-26  8:21         ` dana
2018-10-26  9:28           ` Jesper Nygårds
2018-10-28  2:45           ` Bart Schaefer
2019-07-23  3:38 ` Sebastian Gniazdowski
2019-07-23  7:42   ` Sebastian Gniazdowski
2019-07-23  8:03     ` Sebastian Gniazdowski
2019-09-08  8:59     ` Sebastian Gniazdowski [this message]

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