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Re: Extension of while syntax

From cl@isbd.net
Newsgroups comp.lang.python
Subject Re: Extension of while syntax
Date 2014-12-12 09:09 +0000
Message-ID <qunqlb-a3o.ln1@chris.zbmc.eu> (permalink)
References <14d2b880-3837-4267-a769-33ae7393f78b@googlegroups.com> <mailman.16886.1418351925.18130.python-list@python.org> <87r3w5gx7s.fsf@elektro.pacujo.net>

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Marko Rauhamaa <marko@pacujo.net> wrote:
> Chris Angelico <rosuav@gmail.com>:
> 
> > You could deduplicate it by shifting the condition:
> >
> > while True:
> >     value = get_some_value()
> >     if value not in undesired_values: break
> >
> > But I'm not sure how common this idiom actually is.
> 
> Extremely common, and not only in Python.
> 
It's the classic C 'for' loop.

'for' in C is essentially a while with an initialiser for the loop
variable.

-- 
Chris Green
ยท

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Thread

Extension of while syntax Nelson Crosby <nc@sourcecomb.com> - 2014-12-11 18:21 -0800
  Re: Extension of while syntax Ben Finney <ben+python@benfinney.id.au> - 2014-12-12 13:37 +1100
  Re: Extension of while syntax Chris Angelico <rosuav@gmail.com> - 2014-12-12 13:38 +1100
    Re: Extension of while syntax Marko Rauhamaa <marko@pacujo.net> - 2014-12-12 09:10 +0200
      Re: Extension of while syntax Chris Angelico <rosuav@gmail.com> - 2014-12-12 18:38 +1100
        Re: Extension of while syntax Marko Rauhamaa <marko@pacujo.net> - 2014-12-12 10:25 +0200
      Re: Extension of while syntax cl@isbd.net - 2014-12-12 09:09 +0000
        Re: Extension of while syntax Marko Rauhamaa <marko@pacujo.net> - 2014-12-12 12:33 +0200
  RE: Extension of while syntax "Clayton Kirkwood" <crk@godblessthe.us> - 2014-12-11 18:59 -0800
  Re: Extension of while syntax Terry Reedy <tjreedy@udel.edu> - 2014-12-11 22:00 -0500
  Re: Extension of while syntax Ben Finney <ben+python@benfinney.id.au> - 2014-12-12 14:14 +1100
  Re: Extension of while syntax Mark Lawrence <breamoreboy@yahoo.co.uk> - 2014-12-12 08:00 +0000
  Re: Extension of while syntax Chris Angelico <rosuav@gmail.com> - 2014-12-12 19:05 +1100
  Re: Extension of while syntax Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2014-12-12 11:38 -0500
  Re: Extension of while syntax Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-12-13 22:56 +1100

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