zsh-users
 help / color / mirror / code / Atom feed
From: Roman Perepelitsa <roman.perepelitsa@gmail.com>
To: Ray Andrews <rayandrews@eastlink.ca>
Cc: zsh-users@zsh.org
Subject: Re: coloring substitution seems to eat next line.
Date: Thu, 10 Nov 2022 22:51:49 +0100	[thread overview]
Message-ID: <CAN=4vMpkMC+W7ygcDREM8UtJGqs+3RFCmMF-2CE+d_vn5HAHDg@mail.gmail.com> (raw)
In-Reply-To: <6d7ba212-be9d-6bb4-f5ce-9a796032ade0@eastlink.ca>

On Thu, Nov 10, 2022 at 10:42 PM Ray Andrews <rayandrews@eastlink.ca> wrote:
>
>
> On 2022-11-10 12:22, Bart Schaefer wrote:
> >
> > Most of the time you want the parens when assigning all the elements
> > of an array at once.  You should not use the parens for anything
> > that's meant to be a single string (or number).
> Slowly I figure out what's really going on and don't have to rely on
> rote copying of syntax.
> > local MATCH MBEGIN MEND
> > which should never appear except inside a function, and should only
> > appear at the beginning of the function and not inside a loop.
> Heavy duty diagnostic stuff it seems.
> > $~foo (or ${~foo} means that the value of $foo should be interpreted
> > as a glob pattern rather than as a literal string.
>
> Ah!  When you type it in there verbatim it seems to always be the
> pattern, but as a variable who's to say that the intention is?  So some
> way of making it explicit avoids semantic confusion.  That's robust, I
> like it.  One more little thing:
>
>
> string="${cc[$aa]/*(#i)$filter*/}"
> if [[ "$string" ]]; then
> cc[aa]=''
> else
> cc[$aa]=${cc[$aa]/(#b)($~zsh_case${filter})/$'\e['$color;1m${match[1]}$'\e[0m'}

If you look back, you can find in my answers a way to:

1. Remove all elements of an array that don't match a pattern. It has this form:

  array=(${(M)array:#pattern})

2. Perform a replacement in all elements of an array. Like this:

  array=(${array//pattern/substitute})

Perhaps now you have enough familiarity with the syntax to see how it works.

You can save a tremendous amount of time by reading the official guide
and the reference. Set aside an evening or two and read them from
start to end. Exploring a language as a science project is a great way
to get started but at some point you'll become more efficient by
reading the blueprint. After that the language becomes an artifact
rather than a blackbox.

Roman.


  reply	other threads:[~2022-11-10 21:53 UTC|newest]

Thread overview: 39+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-11-10  0:43 Ray Andrews
2022-11-10  8:02 ` Roman Perepelitsa
2022-11-10 18:25   ` Ray Andrews
2022-11-10 18:36     ` Roman Perepelitsa
2022-11-10 18:45       ` Ray Andrews
2022-11-10 18:54       ` Bart Schaefer
2022-11-10 19:28         ` Ray Andrews
2022-11-10 20:22           ` Bart Schaefer
2022-11-10 21:42             ` Ray Andrews
2022-11-10 21:51               ` Roman Perepelitsa [this message]
2022-11-11 17:24                 ` Ray Andrews
2022-11-10 22:47               ` Bart Schaefer
2022-11-10 23:07                 ` Ray Andrews
2022-11-10 23:27                   ` Bart Schaefer
2022-11-11 15:00                     ` Ray Andrews
2022-11-11 18:15                       ` Bart Schaefer
2022-11-11 18:50                         ` Ray Andrews
2022-11-11 19:25                           ` Bart Schaefer
2022-11-11 21:26                             ` Ray Andrews
2022-11-12  4:24                               ` Bart Schaefer
2022-11-12 14:03                                 ` Ray Andrews
2022-11-13 15:09                                   ` Ray Andrews
2022-11-14 14:12                                     ` Roman Perepelitsa
2022-11-14 17:08                                     ` Ray Andrews
2022-11-14 17:12                                       ` Roman Perepelitsa
2022-11-14 18:58                                         ` Ray Andrews
2022-11-14 20:00                                           ` Bart Schaefer
2022-11-14 23:25                                             ` Ray Andrews
2022-11-15 14:17                                               ` Belaboring substitution syntax Ray Andrews
2022-11-16  1:49                                                 ` Bart Schaefer
2022-11-16  2:54                                                   ` Ray Andrews
2022-11-16  6:26                                                     ` Bart Schaefer
2022-11-16 14:08                                                       ` Ray Andrews
2022-11-16 14:13                                                         ` Roman Perepelitsa
2022-11-17  2:31                                                           ` Bart Schaefer
2022-11-17  8:59                                                             ` Roman Perepelitsa
2022-11-17 16:02                                                               ` Ray Andrews
2022-11-16 20:46                                                       ` Ray Andrews
2022-11-16 10:32                                                   ` Roman Perepelitsa

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='CAN=4vMpkMC+W7ygcDREM8UtJGqs+3RFCmMF-2CE+d_vn5HAHDg@mail.gmail.com' \
    --to=roman.perepelitsa@gmail.com \
    --cc=rayandrews@eastlink.ca \
    --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).