From: Lewis Butler <lbutler@covisp.net>
To: Zsh Users <zsh-users@zsh.org>
Subject: Parameter subsitution
Date: Fri, 8 Jan 2021 15:02:17 -0700 [thread overview]
Message-ID: <6B1D00CF-E282-49D3-8ABE-88AB8EBED62B@covisp.net> (raw)
Reading through the docs:
The s/l/r/ substitution works as follows.
[. . . ]
* A null l uses the previous string either from the previous l or from the contextual scan string s from ‘!?s’.
And
* Note the same record of the last l and r is maintained across all forms of expansion.
Does this mean that l is recorded until the shell terminates or until a new l is used? Is there a way to see what the current l is set to?
$ file="/usr/local/tmp/filename.txt"
$ echo ${file:s|e|3}
/usr/local/tmp/fil3name.txt
$ echo ${file:s||4}
/usr/local/tmp/filename.txt
Doesn't look like the l is maintained?
And where is the !?s syntax defined?
Any examples of using !?s in anger?
--
ɹןʇnqן
<mailto:lbutler@covisp.net>
tel:+1.303.219.0564
next reply other threads:[~2021-01-08 22:02 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-08 22:02 Lewis Butler [this message]
2021-01-08 22:25 ` Bart Schaefer
2021-01-08 22:31 ` Lewis Butler
2021-01-08 22:53 ` Bart Schaefer
2021-01-08 23:46 ` Lewis Butler
2021-01-09 0:00 ` Lawrence Velázquez
2021-01-09 0:49 ` Bart Schaefer
2021-01-09 1:09 ` Lewis Butler
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