From: Ray Andrews <rayandrews@eastlink.ca>
To: zsh-users@zsh.org
Subject: Re: backreferences
Date: Thu, 15 Oct 2015 18:16:03 -0700 [thread overview]
Message-ID: <56204FD3.9040500@eastlink.ca> (raw)
In-Reply-To: <151015161602.ZM30622@torch.brasslantern.com>
On 10/15/2015 04:16 PM, Bart Schaefer wrote:
> [[ "$sstring" = (#b)([^i]#inside)(*) ]]
Very good, I tried a few things and missed the one that works. But I'm
finding out that
it's dangerous w.o. the test, since 'match' will remain silently
unchanged if the
comparison fails.
> ... or it might mean that
> you're trying to not-match multiple characters in the tested string in
> a certain order.
Yes.
> In the latter case you want ^(string), or more often
> (^(string)), but you also must setopt EXTENDED_GLOB.
Sorry for the ambiguity. Clarity in the mind of the sender and clarity
in the mind
of the receiver are not the same thing. I mean that the match should
fail not on
meeting one character (or selection of characters), but it should fail
on meeting
a specific sequence of characters:
test ()
{
sstring="abcdeedcbaabcde"
if [[ "$sstring" = (#b)([(^(edcba))]*)(edcba)(*) ]];
then
echo "you have a match"
else
match=
fi
echo "one $match[1]"
echo "two $match[2]"
echo "three $match[3]"
}
one abcde
two edcba
three abcde
I tried to learn how to do that with sed and never did get it figured out.
zsh can give us just about most of what we want anyway. Pretty cool.
Thanks.
next prev parent reply other threads:[~2015-10-16 1:16 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-15 18:28 backreferences Ray Andrews
2015-10-15 23:16 ` backreferences Bart Schaefer
2015-10-16 1:16 ` Ray Andrews [this message]
2015-10-16 2:30 ` backreferences Bart Schaefer
2015-10-16 4:11 ` backreferences Mikael Magnusson
2015-10-16 4:27 ` backreferences Kurtis Rader
2015-10-16 5:42 ` backreferences Ray Andrews
2015-10-16 5:05 ` backreferences Bart Schaefer
2015-10-16 5:28 ` backreferences Bart Schaefer
2015-10-16 5:46 ` backreferences Ray Andrews
2015-10-16 11:14 ` backreferences Peter Stephenson
2015-10-16 5:36 ` backreferences Ray Andrews
2015-10-16 12:35 ` backreferences Bart Schaefer
2015-10-16 16:37 ` backreferences Ray Andrews
2015-10-17 3:33 ` backreferences Bart Schaefer
2015-10-17 5:16 ` backreferences Ray Andrews
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=56204FD3.9040500@eastlink.ca \
--to=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).