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From: dana <dana@dana.is>
To: "Андрей Варяница" <asvs07@gmail.com>
Cc: zsh-workers@zsh.org
Subject: Re: probably a bug in 'tr' command
Date: Tue, 12 Mar 2019 00:23:35 -0500	[thread overview]
Message-ID: <5F2C93C6-BA3B-416F-BAEC-58EB55C57C7F@dana.is> (raw)
In-Reply-To: <7bdcddb8-75b1-3dcf-d5bb-b538448fde4b@gmail.com>

On 12 Mar 2019, at 02:06, Андрей Варяница <asvs07@gmail.com> wrote:
>When I run the following command in zsh I get empty result.
>
>echo '-' | tr -dc '[0-9]-'
>
>Expected result is single dash as output.

From the manual section on the echo built-in:

>Note that for standards compliance a double dash does not terminate option
>processing; instead, it is printed directly. However, a single dash does
>terminate option processing, so the first dash, possibly following options,
>is not printed, but everything following it is printed as an argument. The
>single dash behaviour is different from other shells. For a more portable way
>of printing text, see printf, and for a more controllable way of printing
>text within zsh, see print.

dana


  reply	other threads:[~2019-03-12  5:24 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-03-12  7:06 Андрей Варяница
2019-03-12  5:23 ` dana [this message]
2019-03-12  7:41   ` Андрей Варяница

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