From: "Lawrence Velázquez" <larryv@zsh.org>
To: "Roman Perepelitsa" <roman.perepelitsa@gmail.com>
Cc: zsh-users@zsh.org
Subject: Re: The elements of enlightenment
Date: Tue, 06 Dec 2022 18:52:44 -0500 [thread overview]
Message-ID: <21586f92-9a78-419c-84e5-f203a6f069b6@app.fastmail.com> (raw)
In-Reply-To: <CAN=4vMp_LqvioJE_uW2_CwJ7CKL2dVwGn-6LMonPf_5pfngkzA@mail.gmail.com>
On Tue, Dec 6, 2022, at 1:55 PM, Roman Perepelitsa wrote:
> That said, it's totally possible to extend zsh with something like $[
> ... ] which would work like $( ... ) but without forking. It would run
> the commands in another thread within the same process.
FWIW, ksh has a ${ list;} construct that avoids a subshell:
$ cd / && pwd
/
$ : "${ cd /tmp;}" && pwd
/tmp
$ : "${ cd /usr }" && pwd
/usr
Amusingly, the archaic $[...] is still used for arithmetic expansion.
It's even documented! (Other shells have memory-holed it.)
--
vq
next prev parent reply other threads:[~2022-12-06 23:55 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-12-05 15:57 Ray Andrews
2022-12-05 16:24 ` Roman Perepelitsa
2022-12-05 18:30 ` Bart Schaefer
2022-12-05 19:35 ` Ray Andrews
2022-12-05 19:44 ` Bart Schaefer
2022-12-05 19:58 ` Roman Perepelitsa
2022-12-05 21:20 ` Ray Andrews
2022-12-05 21:49 ` Roman Perepelitsa
2022-12-05 23:52 ` Ray Andrews
2022-12-06 0:17 ` Bart Schaefer
2022-12-06 1:34 ` Ray Andrews
2022-12-06 18:55 ` Roman Perepelitsa
2022-12-06 19:45 ` Bart Schaefer
2022-12-06 20:01 ` Roman Perepelitsa
2022-12-06 20:07 ` Bart Schaefer
2022-12-06 20:22 ` Roman Perepelitsa
2022-12-06 23:52 ` Lawrence Velázquez [this message]
2022-12-07 1:04 ` Lawrence Velázquez
2022-12-05 21:49 ` Bart Schaefer
2022-12-05 21:51 ` Bart Schaefer
2022-12-05 22:24 ` Ray Andrews
2022-12-05 23:24 ` Bart Schaefer
2022-12-06 1:47 ` Ray Andrews
2022-12-06 6:39 ` Lawrence Velázquez
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