Hi Davey,
On Thu, Feb 13, 2014 at 12:58 PM, Davey Shafik <[email protected]> wrote:
> I've written up an RFC/Patch to gauge interest and get feedback on the
> addition of a combined comparison (aka: spaceship) operator.
>
> You can see the RFC at: https://wiki.php.net/rfc/
> combined-comparison-operator
>
> This adds a new operator "(expr) <=> (expr)" that returns 0 if both
> operands are equal, 1 if the left is greater, and -1 if the right is
> greater.
>
> It works with all types (just as well as <, <=, >=, > work) and is great
> for usort() callbacks for example.
>
> Code available here (against 5.6): https://github.com/dshafik/
> php-src/compare/add-spaceship-operator
>
> I'd love to get this into 5.6, not sure if we hit feature freeze yet.
> Also, not sure if it needs 2/3 majority, but assumed so as pow did?
>
> Thoughts?
>
> If there is interest, I'll start adding tests. They should be fairly
> trivial.
>
Interesting shortcut operator.
I feel closure function is for the task.
I would vote 0, but close to -1 since it's only useful for sorting.
Is there any other use cases?
Regards,
--
Yasuo Ohgaki
[email protected]