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Groups > comp.lang.python > #102280
| From | Christian Gollwitzer <auriocus@gmx.de> |
|---|---|
| Newsgroups | comp.lang.python |
| Subject | Re: Mimick tac with python. |
| Date | 2016-01-30 07:03 +0100 |
| Organization | A noiseless patient Spider |
| Message-ID | <n8hjis$gte$1@dont-email.me> (permalink) |
| References | <n8hf7c$lqe$1@aspen.stu.neva.ru> <mailman.111.1454129921.2338.python-list@python.org> |
Am 30.01.16 um 05:58 schrieb Random832:
> On Fri, Jan 29, 2016, at 23:46, Hongyi Zhao wrote:
>> awk '{a[NR]=$0} END {while (NR) print a[NR--]}' input_file
>> perl -e 'print reverse<>' input_file
>
> Well, both of those read the whole file into memory - tac is sometimes
> smarter than that, but that makes for a more complex program.
Now I'm curious. How is it possible to output the first line as last
again if not by remembering it from the every beginning? How could tac
be implemented other than sucking up everything into memory?
Christian
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Mimick tac with python. Hongyi Zhao <hongyi.zhao@gmail.com> - 2016-01-30 04:46 +0000
Re: Mimick tac with python. Random832 <random832@fastmail.com> - 2016-01-29 23:58 -0500
Re: Mimick tac with python. Christian Gollwitzer <auriocus@gmx.de> - 2016-01-30 07:03 +0100
Re: Mimick tac with python. Jussi Piitulainen <jussi.piitulainen@helsinki.fi> - 2016-01-30 09:56 +0200
Re: Mimick tac with python. Christian Gollwitzer <auriocus@gmx.de> - 2016-01-30 10:23 +0100
Re: Mimick tac with python. Peter Otten <__peter__@web.de> - 2016-01-30 09:21 +0100
Re: Mimick tac with python. Terry Reedy <tjreedy@udel.edu> - 2016-01-30 04:38 -0500
Re: Mimick tac with python. Hongyi Zhao <hongyi.zhao@gmail.com> - 2016-01-30 06:18 +0000
Re: Mimick tac with python. Chris Angelico <rosuav@gmail.com> - 2016-01-30 15:56 +1100
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