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From: Janis Papanagnou <janis_papanagnou+ng@hotmail.com>
Newsgroups: comp.unix.shell
Subject: Re: Numerically sorted arguments (in shell)
Date: Sun, 16 Jun 2024 11:48:25 +0200
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On 16.06.2024 06:56, Lawrence D'Oliveiro wrote:
> On Sun, 16 Jun 2024 05:11:29 +0200, Janis Papanagnou wrote:
> 
>> I don't know of this feature in Perl or Python; please provide some hint
>> if there is a feature like the one I need. Some code samples for
>> demonstration of your point are also welcome.
> 
> Python solution:
> 
>     import re
> 
>     items = \
>         [
>             "P1.HTM", "P10.HTM", "P11.HTM", "P2.HTM", "P3.HTM",
>             "P4.HTM", "P5.HTM", "P6.HTM", "P7.HTM", "P8.HTM", "P9.HTM",
>         ]
> 
>     print(items)
> 
>     print \
>       (
>         sorted
>           (
>             items,
>             key = lambda f :
>                 tuple
>                   (
>                     (lambda : p, lambda : int(p))[i % 2 != 0]()
>                         for i, p in enumerate(re.split("([0-9]+)", f))
>                   )
>           )
>       )
> 
> output:
> 
>     ['P1.HTM', 'P10.HTM', 'P11.HTM', 'P2.HTM', 'P3.HTM', 'P4.HTM', 'P5.HTM', 'P6.HTM', 'P7.HTM', 'P8.HTM', 'P9.HTM']
>     ['P1.HTM', 'P2.HTM', 'P3.HTM', 'P4.HTM', 'P5.HTM', 'P6.HTM', 'P7.HTM', 'P8.HTM', 'P9.HTM', 'P10.HTM', 'P11.HTM']
> 

Thanks. Though I'm not familiar with Python to understand that code;
it's too far from any language I've been using.

The (for me) interesting question, though, is; how does it solve the
task I had been addressing? - For convenience I reiterate one main
application...

I want from my shell command line interface call a viewer (or any
other application) with a list of files. If in shell I do, e.g.,

  viewer P*.HTM

the list gets sorted lexicographically. How would the main function
look like that I could embed in my call to make a numerically sorted
list. Say, something like, for example,

  viewer $( p_sort P*.HTM )

where p_sort would be the Python code. - Note: this is no appropriate
solution since it would anyway not work correctly for file names with
embedded blanks and newlines. I just want to get a closer understanding
how you think this would be usable in shell (or from shell). Thanks.

Janis