From: Roman Perepelitsa <roman.perepelitsa@gmail.com>
To: Clinton Bunch <cdb_zsh@zentaur.org>
Cc: zsh-users@zsh.org
Subject: Re: why is eval needed?
Date: Sat, 19 Nov 2022 19:18:03 +0100 [thread overview]
Message-ID: <CAN=4vMozGYZEPViJ9D8pjU2m1JhbGPCyQE_4u=TGLbUeSRWBwA@mail.gmail.com> (raw)
In-Reply-To: <fa96928a-ffb9-4821-9ce3-7f064a69cd3f@zentaur.org>
On Sat, Nov 19, 2022 at 7:03 PM Clinton Bunch <cdb_zsh@zentaur.org> wrote:
>
> Another option is
>
> local level='-L 2'
>
> tree $=level
If you really have to use a scalar instead of an array and then split
it, then doing the following is usually the way to go:
local args=(${(z)level})
tree "${(@Q)args}"
This allows you to pass quoted and empty arguments:
level='foo "bar baz" "" qux'
Note that if you combine the two expansions into one
("${(@Q)${(@z)level}}"), you'll have incorrect results when $level is
empty.
You can do the reverse transformation--from array to scalar--like this:
local array=(...)
local scalar=${(@q)array}
Roman.
next prev parent reply other threads:[~2022-11-19 18:18 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-19 14:34 Ray Andrews
2022-11-19 14:43 ` Roman Perepelitsa
2022-11-19 17:02 ` Ray Andrews
2022-11-19 17:10 ` Roman Perepelitsa
2022-11-19 18:02 ` Clinton Bunch
2022-11-19 18:18 ` Roman Perepelitsa [this message]
2022-11-19 16:48 ` Stephane Chazelas
2022-11-19 19:12 ` Ray Andrews
2022-11-19 19:50 ` Lawrence Velázquez
2022-11-19 22:21 ` Ray Andrews
2022-11-20 8:55 ` Stephane Chazelas
2022-11-20 13:47 ` Ray Andrews
2022-11-20 15:08 ` Stephane Chazelas
2022-11-20 16:27 ` Ray Andrews
2022-11-20 20:16 ` Stephane Chazelas
2022-11-20 22:31 ` Bart Schaefer
2022-11-21 2:13 ` Ray Andrews
2022-11-20 22:47 ` Ray Andrews
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