From: ralph@inputplus.co.uk (Ralph Corderoy)
Subject: [TUHS] ed(1) and Pipes.
Date: Wed, 15 Nov 2017 12:36:30 +0000 [thread overview]
Message-ID: <20171115123630.159F51F978@orac.inputplus.co.uk> (raw)
Hi,
ed(1) pre-dates pipes. When pipes came along, stderr was needed, and
lots of new idioms were found to make use of them. Why didn't ed gain a
`filter' command to accompany `r !foo' and `w !bar'?
To sort this paragraph, I
;/^$/w !sort >t
;/^$/d
-r t
I'd have thought that filtering was common enough to suggest a `^'
command with an implied `!'? (Not `|' since that was uncommon then.)
ex(1) has `!' that filters if applied to a range of lines, and this
carries through to vi's `!' that's often heavily used, especially when
the "file" is just a scratch buffer of commands, input, and output.
--
Cheers, Ralph.
https://plus.google.com/+RalphCorderoy
next reply other threads:[~2017-11-15 12:36 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-15 12:36 Ralph Corderoy [this message]
2017-11-15 22:16 Norman Wilson
2017-11-18 16:09 ` Ralph Corderoy
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