zsh-users
 help / color / mirror / code / Atom feed
From: "Jesper Nygårds" <jesper.nygards@gmail.com>
To: Zsh Users <zsh-users@zsh.org>
Subject: Filtering array on index
Date: Thu, 25 Oct 2018 13:29:01 +0200	[thread overview]
Message-ID: <CABZhJg80vQuMHGKABkzR1bdtt89Akpkfd8kWOV83N-qvqioaXw@mail.gmail.com> (raw)

[-- Attachment #1: Type: text/plain, Size: 909 bytes --]

I have an array which is the result of using zparseopts on a specification
that makes it possible to specify several filters with a -v flag. The
resulting array might look like the following:

myarr=(-v filter1 -v filter2)

I want to get rid of the "-v" elements, but only when they are the flag,
and not the argument. In other words, I would the like the array (-v
filter1 -v -v) to result in (filter1 -v).

I had previously used:

${myarr:#-v}}

which worked well, as I could accept the fact that -v was not possible to
use as the option argument.

However, now I need to make sure that a -v argument is preserved, and I
thus need a compact way of specifying that I want to keep every other
element in the array.

The most compact way I have found is:
for dash arg in $myarr; do myarr[(r)$dash]=()

This works, but I was wondering if there's some more elegant solution,
preferrably without using iteration?

             reply	other threads:[~2018-10-25 11:29 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-10-25 11:29 Jesper Nygårds [this message]
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

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=CABZhJg80vQuMHGKABkzR1bdtt89Akpkfd8kWOV83N-qvqioaXw@mail.gmail.com \
    --to=jesper.nygards@gmail.com \
    --cc=zsh-users@zsh.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
Code repositories for project(s) associated with this public inbox

	https://git.vuxu.org/mirror/zsh/

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).