Re: sort by line length
According to Georg Müller on 4/24/2007 6:22 AM: Dear coreutils team, I would like to see a sort by line length in the sort tool. Is anything like this planned. Not really planned, but it doesn't sound all that bad to me. Submit a patch for discussion, if you would like. But it sounds non-trivial (don't forget the documentation and testsuite), so you will need copyright assignment on file. It seems easy to implement. I could also write the code for that, if you wish. It may be possible to already do this with existing tools, although certainly not conventional. For example, it can probably be achieved already by writing a custom locale that treats all bytes as the same collation class, so that strcoll then compares according to line length. Or you could use a series of operations, such as sed to number the lines and convert all remaining characters to a single character, sort the converted file by the reduced key, and then use the resulting order of the line numbers as the directions for which order to retrieve lines from the original file. -- Don't work too hard, make some time for fun as well! Eric Blake [EMAIL PROTECTED] signature.asc Description: OpenPGP digital signature ___ Bug-coreutils mailing list Bug-coreutils@gnu.org http://lists.gnu.org/mailman/listinfo/bug-coreutils
Re: sort by line length
Georg Müller [EMAIL PROTECTED] wrote:
I would like to see a sort by line length in the sort tool.
Is anything like this planned.
It seems easy to implement.
I could also write the code for that, if you wish.
You can do this in perl (or awk, ruby, etc) as a one-liner,
so it may not be worth adding to a C application:
echo 1 938 four aa a | fmt -1 \
| perl -ne 'push @line, $_;sub END{print sort {length $a=length $b} @line}'
1
aa
938
four
a
Is that good enough for you?
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Re: sort by line length
Georg Müller wrote: Dear coreutils team, I would like to see a sort by line length in the sort tool. Is anything like this planned. It seems easy to implement. I could also write the code for that, if you wish. That seems like a very specific need which is probably best fulfilled with a combination of tools? Have you an example of why you need this? If I was doing it, I would use my funcpy tool¹ as follows, to transform the data into the appropriate format: funcpy '%d\t%s % (len(x),x)' | sort -k1,1n | cut -f2- thanks, Pádraig. ¹http://www.pixelbeat.org/scripts/funcpy ___ Bug-coreutils mailing list Bug-coreutils@gnu.org http://lists.gnu.org/mailman/listinfo/bug-coreutils
Re: sort by line length
Jim Meyering wrote:
You can do this in perl (or awk, ruby, etc) as a one-liner,
so it may not be worth adding to a C application:
echo 1 938 four aa a | fmt -1 \
| perl -ne 'push @line, $_;sub END{print sort {length $a=length $b}
@line}'
1
aa
938
four
a
Not to derail on perl golfing but how about just:
$ perl -e 'print sort {length($a)=length($b)} ' file
Brian
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Re: sort by line length
Georg Müller [EMAIL PROTECTED] writes:
I would like to see a sort by line length in the sort tool.
awk '{ print length(), $0 }' input | sort -k1,1n | cut -d' ' -f2- output
Andreas.
--
Andreas Schwab, SuSE Labs, [EMAIL PROTECTED]
SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany
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And now for something completely different.
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Re: sort by line length
I know that I can solve this by these combinations, but having a -l flag for sort would be much shorter to write and I am not so familiar with perl. It was just an idea to make things easier, if you don't like it, ignore it. I need it atm for bug fixing other stuff, but searched for that a time ago... Thanks for the quick answers, Georg ___ Bug-coreutils mailing list Bug-coreutils@gnu.org http://lists.gnu.org/mailman/listinfo/bug-coreutils
