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Re: List Problem

References <5126348a-8e87-493d-975c-d6273e59784c@googlegroups.com> <b6555e91-54ba-42fb-bd99-561cb971c2ce@googlegroups.com> <505F8734.2020908@davea.name> <mailman.1160.1348439251.27098.python-list@python.org> <505f8f1e$0$1612$c3e8da3$76491128@news.astraweb.com>
Date 2012-09-24 08:45 +1000
Subject Re: List Problem
From Chris Angelico <rosuav@gmail.com>
Newsgroups comp.lang.python
Message-ID <mailman.1162.1348440319.27098.python-list@python.org> (permalink)

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On Mon, Sep 24, 2012 at 8:37 AM, Steven D'Aprano
<steve+comp.lang.python@pearwood.info> wrote:
> On Mon, 24 Sep 2012 08:27:28 +1000, Chris Angelico wrote:
>
>> C simply doesn't let you move
>> arrays around, only pointers to them, so semantics are actually pretty
>> similar to high level languages, only in a completely different way.
>
> I once dated a girl who looked exactly like Scarlett Johannsen only
> completely different.
>
> Pascal let's you pass arrays around either by value (which copies them,
> and may be expensive) or by reference (which doesn't), neither of which
> is what Python (or Java, Ruby, etc.) do. Passing pointers by value is not
> the same as Python object semantics.

If your arrays are allocated on the heap, you can pretty much treat
the pointer like a HLL list object. The only real difference is that
C, by default, won't garbage-collect your heap allocations, so you'll
leak memory. The behaviours you observe will be pretty similar,
though.

ChrisA

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Thread

List Problem jimbo1qaz <jimmyli1528@gmail.com> - 2012-09-23 14:31 -0700
  Re: List Problem jimbo1qaz <jimmyli1528@gmail.com> - 2012-09-23 14:44 -0700
    Re: List Problem Chris Angelico <rosuav@gmail.com> - 2012-09-24 07:57 +1000
    Re: List Problem Dave Angel <d@davea.name> - 2012-09-23 18:03 -0400
    Re: List Problem Chris Angelico <rosuav@gmail.com> - 2012-09-24 08:27 +1000
      Re: List Problem Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-09-23 22:37 +0000
        Re: List Problem Chris Angelico <rosuav@gmail.com> - 2012-09-24 08:45 +1000
    Re: List Problem Chris Angelico <rosuav@gmail.com> - 2012-09-24 08:30 +1000
    Re: List Problem "Littlefield, Tyler" <tyler@tysdomain.com> - 2012-09-23 18:56 -0600
    Re: List Problem Chris Angelico <rosuav@gmail.com> - 2012-09-24 11:52 +1000
  Re: List Problem Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-09-23 22:07 +0000
  Re: List Problem jimbo1qaz <jimmyli1528@gmail.com> - 2012-09-23 15:44 -0700

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