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Groups > comp.lang.python > #105296
| Newsgroups | comp.lang.python |
|---|---|
| Date | 2016-03-20 01:01 -0700 |
| References | (6 earlier) <ncbac2$qtk$1@ger.gmane.org> <56E93ADD.9040500@rece.vub.ac.be> <mailman.191.1458126480.12893.python-list@python.org> <ncbf5e$uq4$1@dont-email.me> <87vb4md362.fsf@elektro.pacujo.net> |
| Message-ID | <a4dc380a-01be-4257-8f2e-477b7a05c24f@googlegroups.com> (permalink) |
| Subject | Re: Case Statements |
| From | Rustom Mody <rustompmody@gmail.com> |
On Wednesday, March 16, 2016 at 5:51:21 PM UTC+5:30, Marko Rauhamaa wrote:
> BartC :
>
> > On 16/03/2016 11:07, Mark Lawrence wrote:
> >> but I still very much doubt we'll be adding a switch statement --
> >> it's a "sexy" language design issue
> >
> > That's the first time I've heard a language feature common in C
> > described as sexy.
>
> Scheme has a "switch" statement (a "case" form). However, it is slightly
> better equipped for it than Python:
>
> * Scheme has an atom type ("symbol"). It corresponds to interned
> strings and is supposed to be compared by reference.
>
> * Scheme has defined three equality operators: "eq?", "eqv?" and
> "equal?". Python only has two: "is" (~ "eq?") and "==" (~ "equal?").
> The "case" form makes use of the operator "eqv?" that is missing from
> Python ("eqv?" compares numbers numerically but is otherwise the same
> as "eq?").
>
>
> Marko
I think it needs to be mentioned:
Almost every modern functional language has pattern matching
And pattern matching is really case statements on steroids
https://www.vex.net/~trebla/haskell/crossroad.xhtml
From those of us who regularly use functional programming, its important
to say that the things that get big press -- lambdas, monads etc -- are probably
less significant than things like pattern matching that dont
A smattering of languages that support it:
Erlang: http://erlang.org/doc/reference_manual/functions.html
Scala: https://kerflyn.wordpress.com/2011/02/14/playing-with-scalas-pattern-matching/
SML: http://www.cs.cornell.edu/courses/cs312/2004fa/lectures/lecture3.htm
Clojure : https://github.com/clojure/core.match
Scheme is an odd case: Does not have it builtin but writing a macro for that is
an entertaining exercise
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Case Statements jj0gen0info@gmail.com - 2016-03-15 13:46 -0700
Re: Case Statements Mark Lawrence <breamoreboy@yahoo.co.uk> - 2016-03-15 23:11 +0000
Re: Case Statements jj0gen0info@gmail.com - 2016-03-15 16:47 -0700
Re: Case Statements Mark Lawrence <breamoreboy@yahoo.co.uk> - 2016-03-15 23:58 +0000
Re: Case Statements BartC <bc@freeuk.com> - 2016-03-16 00:51 +0000
Re: Case Statements Mark Lawrence <breamoreboy@yahoo.co.uk> - 2016-03-16 01:05 +0000
Re: Case Statements jj0gen0info@gmail.com - 2016-03-15 18:55 -0700
Re: Case Statements "Mario R. Osorio" <nimbiotics@gmail.com> - 2016-03-15 21:06 -0700
Re: Case Statements BartC <bc@freeuk.com> - 2016-03-16 10:34 +0000
Re: Case Statements Steven D'Aprano <steve@pearwood.info> - 2016-03-16 23:56 +1100
Re: Case Statements Mark Lawrence <breamoreboy@yahoo.co.uk> - 2016-03-16 04:26 +0000
Re: Case Statements Christian Gollwitzer <auriocus@gmx.de> - 2016-03-16 09:13 +0100
Re: Case Statements Mark Lawrence <breamoreboy@yahoo.co.uk> - 2016-03-16 08:47 +0000
Re: Case Statements Marko Rauhamaa <marko@pacujo.net> - 2016-03-16 11:16 +0200
Re: Case Statements Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2016-03-16 10:35 +0100
Re: Case Statements Mark Lawrence <breamoreboy@yahoo.co.uk> - 2016-03-16 09:51 +0000
Re: Case Statements BartC <bc@freeuk.com> - 2016-03-16 19:41 +0000
Re: Case Statements BartC <bc@freeuk.com> - 2016-03-16 22:30 +0000
Re: Case Statements Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2016-03-16 11:52 +0100
Re: Case Statements Mark Lawrence <breamoreboy@yahoo.co.uk> - 2016-03-16 11:07 +0000
Re: Case Statements BartC <bc@freeuk.com> - 2016-03-16 11:16 +0000
Re: Case Statements Mark Lawrence <breamoreboy@yahoo.co.uk> - 2016-03-16 11:33 +0000
Re: Case Statements Marko Rauhamaa <marko@pacujo.net> - 2016-03-16 14:21 +0200
Re: Case Statements BartC <bc@freeuk.com> - 2016-03-16 12:53 +0000
Re: Case Statements Marko Rauhamaa <marko@pacujo.net> - 2016-03-16 16:31 +0200
Re: Case Statements BartC <bc@freeuk.com> - 2016-03-16 15:00 +0000
Re: Case Statements Marko Rauhamaa <marko@pacujo.net> - 2016-03-16 19:07 +0200
Re: Case Statements Rustom Mody <rustompmody@gmail.com> - 2016-03-20 01:01 -0700
Re: Case Statements Mark Lawrence <breamoreboy@yahoo.co.uk> - 2016-03-20 08:29 +0000
Re: Case Statements Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2016-03-16 14:38 +0100
Re: Case Statements Mark Lawrence <breamoreboy@yahoo.co.uk> - 2016-03-16 14:02 +0000
Re: Case Statements Marko Rauhamaa <marko@pacujo.net> - 2016-03-16 21:27 +0200
Re: Case Statements Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2016-03-17 09:22 +0100
Re: Case Statements Marko Rauhamaa <marko@pacujo.net> - 2016-03-17 10:57 +0200
Re: Case Statements Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2016-03-17 10:12 +0100
Re: Case Statements Steven D'Aprano <steve@pearwood.info> - 2016-03-17 11:19 +1100
Re: Case Statements Steven D'Aprano <steve@pearwood.info> - 2016-03-17 12:54 +1100
Re: Case Statements Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2016-03-17 18:45 +1300
Re: Case Statements Chris Angelico <rosuav@gmail.com> - 2016-03-17 17:30 +1100
Re: Case Statements Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2016-03-18 18:59 +1300
Re: Case Statements Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2016-03-17 17:29 +1100
Re: Case Statements Chris Angelico <rosuav@gmail.com> - 2016-03-17 17:48 +1100
Re: Case Statements Steven D'Aprano <steve@pearwood.info> - 2016-03-17 21:53 +1100
Re: Case Statements Chris Angelico <rosuav@gmail.com> - 2016-03-17 22:49 +1100
Re: Case Statements Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2016-03-17 10:23 +0100
Re: Case Statements Chris Angelico <rosuav@gmail.com> - 2016-03-17 20:55 +1100
Re: Case Statements Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2016-03-17 09:36 +0100
Re: Case Statements Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2016-03-17 09:38 +0100
Re: Case Statements l0r0m0a0i0l@gmail.com - 2016-03-16 06:15 -0700
Re: Case Statements Steven D'Aprano <steve@pearwood.info> - 2016-03-17 00:27 +1100
Re: Case Statements Mark Lawrence <breamoreboy@yahoo.co.uk> - 2016-03-16 14:00 +0000
Re: Case Statements Mark Lawrence <breamoreboy@yahoo.co.uk> - 2016-03-16 13:59 +0000
Re: Case Statements l0r0m0a0i0l@gmail.com - 2016-03-16 07:21 -0700
Re: Case Statements Marko Rauhamaa <marko@pacujo.net> - 2016-03-16 16:33 +0200
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