From: Doug McIlroy <doug@cs.dartmouth.edu>
To: tuhs@tuhs.org
Subject: Re: [TUHS] Command line options and complexity
Date: Wed, 04 Mar 2020 23:57:19 -0500 [thread overview]
Message-ID: <202003050457.0254vJ2Y142485@tahoe.cs.Dartmouth.EDU> (raw)
> These go all the way back to v7 unix, where ls has an option to reverse
the sort order (which could have been done by passing the output to tac).
A cool idea, but tac was not in v7. And tail didn't get the -r
option until v8.
As for rev, I don't know why it was first written, but one
use was to examine suffixes--a kind of thing that several
word lovers in the Unix lab were prone to do.
Apropos of using rev to make rhyming dictionaries, Walker's
Rhyming Dictionary was published decades before Noah
Webster's dictionary appeared and stayed in print
for about 200 years. Notionally the relation between
webster and walker is
rev <webster | sort | rev >walker
Doug
next reply other threads:[~2020-03-05 4:57 UTC|newest]
Thread overview: 68+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-05 4:57 Doug McIlroy [this message]
2020-03-05 22:17 ` Diomidis Spinellis
-- strict thread matches above, loose matches on Subject: below --
2020-03-13 10:45 Dave Horsfall
2020-03-14 4:35 ` Greg 'groggy' Lehey
2020-03-14 19:52 ` John P. Linderman
2020-03-14 20:25 ` Steffen Nurpmeso
2020-03-10 18:42 Doug McIlroy
2020-03-10 19:38 ` Dan Cross
2020-03-10 16:15 Doug McIlroy
2020-03-10 17:38 ` Dan Cross
2020-03-10 17:44 ` Bakul Shah
2020-03-10 18:09 ` Dan Cross
2020-03-04 14:06 Nelson H. F. Beebe
2020-03-04 16:17 ` John P. Linderman
2020-03-04 17:25 ` Bakul Shah
2020-03-05 0:55 ` Rob Pike
2020-03-05 2:05 ` Kurt H Maier
2020-03-05 4:17 ` Ken Thompson via TUHS
2020-03-05 14:53 ` Dan Cross
2020-03-05 21:50 ` Dave Horsfall
2020-03-05 21:56 ` Warner Losh
2020-03-08 5:26 ` Greg 'groggy' Lehey
2020-03-08 5:32 ` Jon Steinhart
2020-03-08 9:30 ` Tyler Adams
[not found] ` <CAC0cEp8eFRkkLTw88WVaKZoKy+qsrhuC8LkzmmsbqtdZgMf8eQ@mail.gmail.com>
[not found] ` <CAEuQd1D7+dfap98AwPo2W41+06prrcVaAWk3Ve-ve0uQ0xBu3Q@mail.gmail.com>
2020-03-09 21:06 ` John P. Linderman
2020-03-09 21:22 ` Kurt H Maier
2020-03-11 17:41 ` John P. Linderman
2020-03-11 21:29 ` Warner Losh
2020-03-12 0:13 ` John P. Linderman
2020-03-12 0:34 ` Chet Ramey
2020-03-12 12:57 ` John P. Linderman
2020-03-12 19:24 ` Steffen Nurpmeso
2020-03-08 9:51 ` Michael Kjörling
2020-03-03 18:15 Jon Steinhart
2020-03-03 18:44 ` Adam Thornton
2020-03-04 4:11 ` Tyler Adams
2020-03-04 6:03 ` Dave Horsfall
2020-03-04 6:48 ` arnold
2020-03-04 21:17 ` Dave Horsfall
2020-03-05 0:49 ` Lyndon Nerenberg
2020-03-05 20:54 ` Dave Horsfall
2020-03-05 22:01 ` William Cheswick
2020-03-04 21:50 ` Random832
2020-03-04 23:19 ` Steffen Nurpmeso
2020-03-05 6:12 ` Alan D. Salewski
2020-03-04 22:03 ` Random832
2020-03-04 23:25 ` Terry Jones
2020-03-10 23:03 ` Dan Stromberg
2020-03-11 3:18 ` Dave Horsfall
2020-03-11 4:02 ` Steve Nickolas
2020-03-11 22:56 ` Greg 'groggy' Lehey
2020-03-11 23:14 ` Dan Cross
2020-03-12 0:42 ` Greg 'groggy' Lehey
2020-03-12 0:53 ` Steve Nickolas
2020-03-12 3:09 ` Greg 'groggy' Lehey
2020-03-12 3:34 ` Steve Nickolas
2020-03-13 1:02 ` Greg 'groggy' Lehey
2020-03-12 5:38 ` Dave Horsfall
2020-03-12 6:48 ` Peter Jeremy
2020-03-12 7:37 ` Steve Nickolas
2020-03-12 7:42 ` Warner Losh
2020-03-12 23:57 ` Greg 'groggy' Lehey
2020-03-12 5:22 ` Dave Horsfall
2020-03-12 5:35 ` Steve Nickolas
2020-03-13 0:36 ` Greg 'groggy' Lehey
2020-03-13 11:26 ` Dave Horsfall
2020-03-14 2:13 ` Greg A. Woods
2020-03-14 4:31 ` Greg 'groggy' Lehey
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