Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.python > #91522 > unrolled thread

Re: Minus operator versus unary minus

Back to article view | Back to comp.lang.python

This discussion starts older than the indexed window; earlier articles aren't shown. The article labeled Started by below is the oldest one visible, not the original post.

Contents

  Re: Minus operator versus unary minus Serhiy Storchaka <storchaka@gmail.com> - 2015-05-30 12:32 +0300

#91522 — Re: Minus operator versus unary minus

On 30.05.15 12:09, Peter Otten wrote:
> Serhiy Storchaka wrote:
>> On 30.05.15 10:56, Peter Otten wrote:
>>> The following modification of the collections.Counter implementation
>>>
>>> https://hg.python.org/cpython/rev/fe4efc0032b5
>>>
>>> was just checked in with the line
>>>
>>> result[elem] = 0 - count
>>>
>>> Does this have an advantage over the obvious
>>>
>>> result[elem] = -count
>>>
>>> ?
>>
>>>>> x = 0.0
>>>>> -x
>> -0.0
>>
>>
>>>>> 0 - x
>> 0.0
>
> That's a subtle difference, but does it matter in the context of the patch?

I don't know. Perhaps there is more meaningful difference for decimals.

This code is not new (see
https://hg.python.org/cpython/rev/e908ebc160f0).

[toc] | [standalone]

Back to top | Article view | comp.lang.python

csiph-web