From: Perry Smith <pedz@easesoftware.com>
To: Marc Chantreux <eiro@phear.org>
Cc: Zsh Users <zsh-users@zsh.org>
Subject: Re: (0) not working ?
Date: Wed, 27 Nov 2019 08:56:51 -0600 [thread overview]
Message-ID: <C294F46F-8800-4201-AA79-094F78A4465D@easesoftware.com> (raw)
In-Reply-To: <20191127141820.GA22743@prometheus.u-strasbg.fr>
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It appears that you need the “p” flag for the join and probably for the split as well.
Also, @ says “In double quotes, array elements are put into separate words.”
But you don’t have double quotes so the @ isn’t needed.
> % var1=( a b c d )
> % var2=${(j:\0:)var1}
> % print $#var2
> 10
At this point var2 is a scaler with two characters ‘\’ and ‘0’ separating what were the words.
> % var3=${(pj:\0:)var1}
> % print $#var3
> 7
This is what you are expecting / needing
> % print -l ${(0)var3}
> a
> b
> c
> d
The print works
> % print -l ${(@0)var3}
> a
> b
> c
> d
The @ isn’t needed
(Again… I’m new here so please verify everything)
> On Nov 27, 2019, at 8:18 AM, Marc Chantreux <eiro@phear.org> wrote:
>
> hello Perry,
>
>> I’m very new here so take what I say with caution but why
>> did you put the backslash before the 0?
>
> if you use xxd:
>
> echo -n 0 $'\0'|xxd
>
> you can see that 0 is the symbol 0x30 (48th of the ascii table)
> when \0 is 00.
>
> \0 is non-sense in a legit text stream so it can be used as
> a separator instead of all those separators that can exist in
> text ( "\n", ",", ":" " ", "\t").
>
> see xargs -0, find -print0, ...
>
> regards
> marc
>
>
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next prev parent reply other threads:[~2019-11-27 14:57 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-27 13:00 Marc Chantreux
2019-11-27 13:54 ` Perry Smith
2019-11-27 14:18 ` Marc Chantreux
2019-11-27 14:56 ` Perry Smith [this message]
2019-11-27 16:15 ` (0) works as a charm Marc Chantreux
2019-11-27 16:24 ` Roman Perepelitsa
2019-11-27 18:14 ` Perry Smith
2019-11-27 19:33 ` (about quoting) " Marc Chantreux
2019-11-27 20:21 ` Perry Smith
2019-11-28 10:55 ` Marc Chantreux
2019-11-27 14:40 ` (0) not working ? Marc Chantreux
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