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Groups > comp.lang.python > #72967

Re: Uniform Function Call Syntax (UFCS)

From Marko Rauhamaa <marko@pacujo.net>
Newsgroups comp.lang.python
Subject Re: Uniform Function Call Syntax (UFCS)
Date 2014-06-08 18:56 +0300
Organization A noiseless patient Spider
Message-ID <8738ff2y4g.fsf@elektro.pacujo.net> (permalink)
References <8b96ae27-20fa-4df9-807e-c806fed983c0@googlegroups.com> <mailman.10859.1402169265.18130.python-list@python.org> <bvhsgeF2on9U2@mid.individual.net> <38058e64-0113-457c-ae63-cc66e8b569cd@googlegroups.com> <mailman.10876.1402229177.18130.python-list@python.org>

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Paul Sokolovsky <pmiscml@gmail.com>:

> Python already has that - like, len(x) calls x.__len__() if it's
> defined

In fact, what's the point of having the duality?

   len(x) <==> x.__len__()

   x < y <==> x.__lt__(y)

   str(x) <==> x.__str__()

etc.

I suppose the principal reason is that people don't like UFCS. Plus some
legacy from Python1 days.

Lisp & co. rigorously follow its UFCS. I think it works great, but that
is what people most ridicule Lisp for.

What do you think? Would you rather write/read:

   if size + len(data) >= limit:

or UFCS-ly:

   if size.__add__(data.__len__()).__le__(limit):


Marko

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Thread

Uniform Function Call Syntax (UFCS) jongiddy <jongiddy@gmail.com> - 2014-06-06 23:45 -0700
  Re: Uniform Function Call Syntax (UFCS) Ian Kelly <ian.g.kelly@gmail.com> - 2014-06-07 13:20 -0600
    Re: Uniform Function Call Syntax (UFCS) Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2014-06-08 13:27 +1200
      Re: Uniform Function Call Syntax (UFCS) jongiddy <jongiddy@gmail.com> - 2014-06-08 01:26 -0700
        Re: Uniform Function Call Syntax (UFCS) Paul Sokolovsky <pmiscml@gmail.com> - 2014-06-08 15:06 +0300
          Re: Uniform Function Call Syntax (UFCS) Marko Rauhamaa <marko@pacujo.net> - 2014-06-08 18:56 +0300
            Re: Uniform Function Call Syntax (UFCS) Ian Kelly <ian.g.kelly@gmail.com> - 2014-06-08 10:38 -0600
            Re: Uniform Function Call Syntax (UFCS) Paul Sokolovsky <pmiscml@gmail.com> - 2014-06-08 19:40 +0300
            Re: Uniform Function Call Syntax (UFCS) Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-06-09 04:33 +0000
              Re: Uniform Function Call Syntax (UFCS) Marko Rauhamaa <marko@pacujo.net> - 2014-06-09 09:25 +0300
                Re: Uniform Function Call Syntax (UFCS) Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-06-09 09:09 +0000
                Re: Uniform Function Call Syntax (UFCS) Chris Angelico <rosuav@gmail.com> - 2014-06-09 19:13 +1000
                Re: Uniform Function Call Syntax (UFCS) Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-06-09 13:37 +0000
                Re: Uniform Function Call Syntax (UFCS) Chris Angelico <rosuav@gmail.com> - 2014-06-10 01:08 +1000
          Re: Uniform Function Call Syntax (UFCS) jongiddy <jongiddy@gmail.com> - 2014-06-08 09:24 -0700
            Re: Uniform Function Call Syntax (UFCS) jongiddy <jongiddy@gmail.com> - 2014-06-08 09:34 -0700
            Re: Uniform Function Call Syntax (UFCS) Ian Kelly <ian.g.kelly@gmail.com> - 2014-06-08 10:54 -0600
            Re: Uniform Function Call Syntax (UFCS) Chris Angelico <rosuav@gmail.com> - 2014-06-09 03:10 +1000
              Re: Uniform Function Call Syntax (UFCS) Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-06-09 03:20 +0000
                Re: Uniform Function Call Syntax (UFCS) Chris Angelico <rosuav@gmail.com> - 2014-06-09 13:44 +1000
                Re: Uniform Function Call Syntax (UFCS) jongiddy <jongiddy@gmail.com> - 2014-06-08 23:38 -0700
                Re: Uniform Function Call Syntax (UFCS) Roy Smith <roy@panix.com> - 2014-06-08 23:45 -0400
      Re: Uniform Function Call Syntax (UFCS) jongiddy <jongiddy@gmail.com> - 2014-06-08 02:25 -0700
        Re: Uniform Function Call Syntax (UFCS) Roy Smith <roy@panix.com> - 2014-06-08 10:59 -0400
          Re: Uniform Function Call Syntax (UFCS) jongiddy <jongiddy@gmail.com> - 2014-06-08 08:39 -0700
            Re: Uniform Function Call Syntax (UFCS) Chris Angelico <rosuav@gmail.com> - 2014-06-09 02:48 +1000
              Re: Uniform Function Call Syntax (UFCS) Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-06-09 03:53 +0000
                Re: Uniform Function Call Syntax (UFCS) Chris Angelico <rosuav@gmail.com> - 2014-06-09 14:53 +1000
                Re: Uniform Function Call Syntax (UFCS) Ian Kelly <ian.g.kelly@gmail.com> - 2014-06-09 08:24 -0600
                Re: Uniform Function Call Syntax (UFCS) jongiddy <jongiddy@gmail.com> - 2014-06-09 23:43 -0700
            Re: Uniform Function Call Syntax (UFCS) Ian Kelly <ian.g.kelly@gmail.com> - 2014-06-08 11:08 -0600
            Re: Uniform Function Call Syntax (UFCS) Chris Angelico <rosuav@gmail.com> - 2014-06-09 03:13 +1000
            Re: Uniform Function Call Syntax (UFCS) Ian Kelly <ian.g.kelly@gmail.com> - 2014-06-08 11:24 -0600
              Re: Uniform Function Call Syntax (UFCS) jongiddy <jongiddy@gmail.com> - 2014-06-08 13:35 -0700
    Re: Uniform Function Call Syntax (UFCS) jongiddy <jongiddy@gmail.com> - 2014-06-08 01:15 -0700
      Re: Uniform Function Call Syntax (UFCS) Paul Sokolovsky <pmiscml@gmail.com> - 2014-06-08 14:52 +0300
      Re: Uniform Function Call Syntax (UFCS) Ian Kelly <ian.g.kelly@gmail.com> - 2014-06-08 11:00 -0600

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