Re: Closures in leu of pointers?

References	(3 earlier) <51CEE8E9.4070703@gmail.com> <51CF1309.1010504@rece.vub.ac.be> <mailman.4001.1372530961.3114.python-list@python.org> <51cf332f$0$29999$c3e8da3$5496439d@news.astraweb.com> <20130629144258.79e86bb0@bigbox.christie.dr>
From	Joshua Landau <joshua.landau.ws@gmail.com>
Date	2013-06-29 21:02 +0100
Subject	Re: Closures in leu of pointers?
Newsgroups	comp.lang.python
Message-ID	<mailman.4009.1372536209.3114.python-list@python.org> (permalink)

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On 29 June 2013 20:42, Tim Chase <tim@thechases.com> wrote:
> On 2013-06-29 19:19, Steven D'Aprano wrote:
>> Nobody ever asks why Python doesn't let you sort an int, or take
>> the square of a list...
>
> just to be ornery, you can sort an int:
>
>>>> i = 314159265
>>>> ''.join(sorted(str(i)))
> '112345569'

To be yet more ornery, you are merely sorting the string
representation of an int.

You can sort an int, though:

    [1].sort()

You may say "No! You are sorting a *list*!" However, is it not fair to
say that with:

    [1, 2, 3, 4, 5].sort()

you are sorting integers? That is just a common english idiom. Hence,
"[1].sort()" sorts an int.

> And I suppose, depending on how you define it, you can square a list:

>From Wikipedia, "a square is the result of multiplying a number, or
other expression, by itself. In other words, squaring is
exponentiation to the power 2."

This means that the only logical definitions would be "list*list" and "list**2".

However, it can be done!

    class PowList(list):
        def __pow__(self, other): pass

    PowList([1, 2, 3])**2

// Because being a pedant is more fun when you're doing it competitively //

Thread

Closures in leu of pointers? cts.private.yahoo@gmail.com - 2013-06-29 02:34 -0700
  Re: Closures in leu of pointers? Fábio Santos <fabiosantosart@gmail.com> - 2013-06-29 10:42 +0100
  Re: Closures in leu of pointers? Peter Otten <__peter__@web.de> - 2013-06-29 12:01 +0200
    Re: Closures in leu of pointers? cts.private.yahoo@gmail.com - 2013-06-29 04:21 -0700
      Re: Closures in leu of pointers? cts.private.yahoo@gmail.com - 2013-06-29 04:44 -0700
        Re: Closures in leu of pointers? Peter Otten <__peter__@web.de> - 2013-06-29 14:12 +0200
          Re: Closures in leu of pointers? cts.private.yahoo@gmail.com - 2013-06-29 05:26 -0700
            Re: Closures in leu of pointers? Mark Lawrence <breamoreboy@yahoo.co.uk> - 2013-06-29 15:37 +0100
              Re: Closures in leu of pointers? cts.private.yahoo@gmail.com - 2013-06-29 07:48 -0700
        Re: Closures in leu of pointers? Michael Torrie <torriem@gmail.com> - 2013-06-29 07:56 -0600
        Re: Closures in leu of pointers? Michael Torrie <torriem@gmail.com> - 2013-06-29 12:36 -0600
      Re: Closures in leu of pointers? Michael Torrie <torriem@gmail.com> - 2013-06-29 08:02 -0600
      Re: Closures in leu of pointers? Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2013-06-29 19:02 +0200
        Re: Closures in leu of pointers? rusi <rustompmody@gmail.com> - 2013-06-29 10:33 -0700
          Re: Closures in leu of pointers? cts.private.yahoo@gmail.com - 2013-06-29 11:37 -0700
            Re: Closures in leu of pointers? Michael Torrie <torriem@gmail.com> - 2013-06-29 12:58 -0600
            Re: Closures in leu of pointers? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-06-29 18:59 +0000
        Re: Closures in leu of pointers? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-06-29 18:51 +0000
          Re: Closures in leu of pointers? Michael Torrie <torriem@gmail.com> - 2013-06-29 13:04 -0600
          Re: Closures in leu of pointers? rusi <rustompmody@gmail.com> - 2013-06-29 12:11 -0700
      Re: Closures in leu of pointers? Michael Torrie <torriem@gmail.com> - 2013-06-29 12:35 -0600
        Re: Closures in leu of pointers? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-06-29 19:19 +0000
          Re: Closures in leu of pointers? Tim Chase <tim@thechases.com> - 2013-06-29 14:42 -0500
            Re: Closures in leu of pointers? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-06-30 01:41 +0000
          Re: Closures in leu of pointers? Joshua Landau <joshua.landau.ws@gmail.com> - 2013-06-29 21:02 +0100
          Re: Closures in leu of pointers? Michael Torrie <torriem@gmail.com> - 2013-06-29 16:02 -0600
      Re: Closures in leu of pointers? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-06-29 18:45 +0000
        Re: Closures in leu of pointers? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-06-29 19:00 +0000
        Re: Closures in leu of pointers? cts.private.yahoo@gmail.com - 2013-06-29 12:20 -0700
          Re: Closures in leu of pointers? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-06-29 19:33 +0000
            Re: Closures in leu of pointers? cts.private.yahoo@gmail.com - 2013-06-29 12:34 -0700
            Re: Closures in leu of pointers? Ian Kelly <ian.g.kelly@gmail.com> - 2013-06-29 13:47 -0600
            Re: Closures in leu of pointers? Terry Reedy <tjreedy@udel.edu> - 2013-06-29 16:53 -0400
              Re: Closures in leu of pointers? rusi <rustompmody@gmail.com> - 2013-06-30 01:56 -0700
                Re: Closures in leu of pointers? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-06-30 11:22 +0000
                Re: Closures in leu of pointers? rusi <rustompmody@gmail.com> - 2013-06-30 04:42 -0700
            Re: Closures in leu of pointers? Ian Kelly <ian.g.kelly@gmail.com> - 2013-06-29 15:21 -0600
              Re: Closures in leu of pointers? cts.private.yahoo@gmail.com - 2013-06-29 14:30 -0700
            Re: Closures in leu of pointers? Terry Reedy <tjreedy@udel.edu> - 2013-06-30 00:32 -0400
            Re: Closures in leu of pointers? Chris Angelico <rosuav@gmail.com> - 2013-06-30 15:08 +1000
              Re: Closures in leu of pointers? rusi <rustompmody@gmail.com> - 2013-06-30 00:36 -0700
            Re: Closures in leu of pointers? Ian Kelly <ian.g.kelly@gmail.com> - 2013-06-29 23:46 -0600
              Re: Closures in leu of pointers? alex23 <wuwei23@gmail.com> - 2013-07-01 14:57 +1000
              Re: Closures in leu of pointers? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-07-01 07:36 +0000
            Re: Closures in leu of pointers? Chris Angelico <rosuav@gmail.com> - 2013-06-30 15:59 +1000
            Re: Closures in leu of pointers? Terry Reedy <tjreedy@udel.edu> - 2013-06-30 02:11 -0400
            Re: Closures in leu of pointers? Ian Kelly <ian.g.kelly@gmail.com> - 2013-06-30 00:24 -0600
          Re: Closures in leu of pointers? Michael Torrie <torriem@gmail.com> - 2013-06-29 16:03 -0600
      Re: Closures in leu of pointers? Ian Kelly <ian.g.kelly@gmail.com> - 2013-06-29 13:23 -0600
      Re: Closures in leu of pointers? Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2013-06-30 12:07 +0200
      Re: Closures in leu of pointers? Ian Kelly <ian.g.kelly@gmail.com> - 2013-06-30 11:13 -0600
      Re: Closures in leu of pointers? Ian Kelly <ian.g.kelly@gmail.com> - 2013-06-30 11:18 -0600

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