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Date: Fri, 14 Feb 2014 14:06:32 +0400
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Subject: Re: [PHP-DEV] [RFC] Combined Comparison Operator
From: inefedor@gmail.com ("Nikita Nefedov")

On Fri, 14 Feb 2014 11:18:53 +0400, Christian Stoller <stoller@leonex.de=
>  =

wrote:

>>>
>>> Why not using `$a - $b` instead of `$a <=3D> $b`?
>>>
>>>
>>> Simon J Welsh <simon@simon.geek.nz> wrote:
>>>> The only real case I see for this is to save some boilerplate when
>>>> dealing with arrays. Strings have strcmp(), numbers have subtractio=
n
>>>> And when you=E2=80=99re sorting objects, you probably want to be do=
ing
>>>> the comparison on some string/numeric property.
>>>>
>>>
>>> Agreed! It would make more sense to write a comparison function for =
 =

>>> arrays/objects.
>>>
>>>
>>> Best regards
>>> Christian
>>>
>>
>> This operator DOES work on arrays/objects. The fact it also works on
>> scalar values is a bonus if that's how you want to look at it :P
>>
>> - Davey
>>
>
> That's why I said, it would make more sense to add a new function for =
 =

> comparing arrays and objects.
> Why adding a new comparison operator if we could achieve the same with=
  =

> one or two additional functions?
>
> And I am not sure, if this is not already possible nowadays.
>
> For arrays you could do: `array_sum($array1) - array_sum($array2)`
>
> And for objects you can define a "sum" method on your objects or a tra=
it  =

> e.g.
>
> trait SummableTrait {
>     public function sum() {
>         $sum =3D 0;
>         foreach (get_object_vars($this) as $value) {
>             $sum +=3D $value;
>         }
>         return $sum;
>    }
> }
>
> You only have to use this trait in your classes and then you can do:  =

> `$object1->sum() - $object2->sum()`
>
> Et voil=C3=A0 :-)
>
> Christian

Hi,

DateTime is the problem here