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Re: Immutability and Python

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andrea crotti <andrea.crotti.0@gmail.com> writes:
> and we want to change its state incrementing the number ...
>  the immutability purists would instead suggest to do this:
>     def increment(self):
>         return NumWrapper(self.number + 1)

Immutability purists would say that numbers don't have "state" and if
you're trying to change a number's state by incrementing it, that's not
immutability.  You end up with a rather different programming style than
imperative programming, for example using tail recursion (maybe wrapped
in an itertools-like higher-order function) instead of indexed loops to
iterate over a structure.

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Immutability and Python andrea crotti <andrea.crotti.0@gmail.com> - 2012-10-29 15:20 +0000
  Re: Immutability and Python Paul Rubin <no.email@nospam.invalid> - 2012-10-29 08:55 -0700
    Re: Immutability and Python Chris Angelico <rosuav@gmail.com> - 2012-10-30 03:08 +1100
    Re: Immutability and Python andrea crotti <andrea.crotti.0@gmail.com> - 2012-10-29 16:33 +0000
  Re: Immutability and Python Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-10-29 23:02 +0000
  Re: Immutability and Python rusi <rustompmody@gmail.com> - 2012-10-30 09:22 -0700
    Re: Immutability and Python Neal Becker <ndbecker2@gmail.com> - 2012-10-30 16:45 -0400
      Re: Immutability and Python rusi <rustompmody@gmail.com> - 2012-10-30 20:21 -0700
  Re: Immutability and Python Thomas Rachel <nutznetz-0c1b6768-bfa9-48d5-a470-7603bd3aa915@spamschutz.glglgl.de> - 2012-11-08 08:38 +0100

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