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Re: empty pipes

X-seq: zsh-users 28525
From: Ray Andrews <rayandrews@xxxxxxxxxxx>
To: zsh-users@xxxxxxx
Subject: Re: empty pipes
Date: Mon, 12 Dec 2022 06:01:55 -0800
Archived-at: <https://zsh.org/users/28525>
In-reply-to: <CAH+w=7YcQ7-QbTvZLjk3=hCKweasrXJxwO6y8vZzaUGrvxjteA@mail.gmail.com>
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References: <c98a568d-c1e6-46a8-9b46-9c4ee37dba38@eastlink.ca> <CAH+w=7YcQ7-QbTvZLjk3=hCKweasrXJxwO6y8vZzaUGrvxjteA@mail.gmail.com>


On 2022-12-11 19:40, Bart Schaefer wrote:


That's why you have e.g. ${filter:-cat}.

Works. Interesting that property 'cat' has of doing nothing there butpolitely moving the stream forward. I don't recall ever using thatconstruction before but the sweet thing is that I now know where to lookfor information about it. Such wealth in the parameter expansions. BTWthanks to our previous discussions concerning 'tree' I already know thatmy $filter must be an array quoted so as to present the correctinvisible structure. Easy once you understand the issue.

BTW, do we have hard spaces? In certain columnizing situations an emptyfield is a problem so a field of hard spaces would hold the positionwhile showing nothing.

Follow-Ups:
- Re: empty pipes
  - From: Bart Schaefer

References:
- empty pipes
  - From: Ray Andrews
- Re: empty pipes
  - From: Bart Schaefer

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