total idiot question: +=, .=, etc...
Bernhard Reiter
bernhard at alpha1.csd.uwm.edu
Mon Jun 28 13:41:22 EDT 1999
On Thu, 24 Jun 1999 09:27:16 +1200, Greg Ewing <greg.ewing at compaq.com> wrote:
>Bernhard Reiter wrote:
>> += just saves some space and typing time.
>It's not quite as simple as that, because
>
> a[i] = a[i] + expr
>and
> a[i] += expr
>
>would be semantically different if the former
>did the index lookup only once.
True.
I guess that using multiple evaluations and their side effects
are a not a good thing anyway. :)
And the python interpreter might optimise the former... >;-)
Bernhard
--
Research Assistant, Geog Dept UM-Milwaukee, USA. (www.uwm.edu/~bernhard)
Funding/Promoting Association for a Free Informational Infrastructure (ffii.org)
More information about the Python-list
mailing list