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From: Chris Elvidge <chris@x550c.mshome.net>
Newsgroups: comp.unix.shell
Subject: Re: Numerically sorted arguments (in shell)
Date: Mon, 24 Jun 2024 15:22:24 +0100
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On 20/06/2024 at 05:34, Janis Papanagnou wrote:
> On 19.06.2024 17:06, Chris Elvidge wrote:
>> On 19/06/2024 at 14:11, Janis Papanagnou wrote:
>>>> [...]
>>>
>>> I tried the approach I outlined above... (here just echo'ing the
>>> created parts)...
>>>
>>>
>>> N=${1:-1}
>>> sed_a="[^0-9]*\([0-9]\+\)[^0-9]*"
>>> sed_r="\1\t"
>>> sort_a="-k1n"
>>> for (( n=2; n<=N; n++ ))
>>> do
>>>       sed_a+="\([0-9]\+\)[^0-9]*"
>>>       sed_r+="\\${n}\t"
>>>       sort_a+=" -k${n}n"
>>> done
>>> cut_a="-f$((N+1))-"
>>>
>>> echo "# The following commands would be connected by pipes:"
>>> echo "sed 's/${sed_a}/${sed_r}&/'"
>>> echo "sort -t$'\t' ${sort_a}"
>>> echo "cut ${cut_a}"
>>>
>>
>> Your way is still restricted to filenames with a known number of sets of
>> digits, though (AFAICS). I.e. you pass N rather than finding it.
> 
> Yes. Above is just a codified version of the method I described
> (thus also the echo's). Whether it's provided as parameter N or
> obtained, say, from one of the files is left unanswered. Myself
> I'd prefer some solution where even file sets with mixed amounts
> of numerical parts may be used; thus being able to handle lists
> that are named like chapters, like  1, 1.1, 1.2, ..., 5.3.3
> 
> Slowly and continuously approaching the goal... :-)
> 
> Janis
> 
>> [...]
> 

Originally you said:
(Ideally I'd also like to handle names with two numbers "A35P56.txt"
and irregular string components (lowercase, say, "page310ch1.txt"),
but that's just a nice-to-have. - I might make use of 'sort'?)

Does 'sort -V' help?
Seems to work with both spaces and newlines.


-- 
Chris Elvidge, England
NO ONE CARES WHAT MY DEFINITION OF "IS" IS