RE: [PHP-DEV] [RFC] Combined Comparison Operator
>>
>> Why not using $a - $b instead of $a <=> $b?
>>
>>
>> Simon J Welsh <[email protected]> wrote:
>>> The only real case I see for this is to save some boilerplate when
>>> dealing with arrays. Strings have strcmp(), numbers have subtraction
>>> And when you’re sorting objects, you probably want to be doing
>>> the comparison on some string/numeric property.
>>>
>>
>> Agreed! It would make more sense to write a comparison function for arrays/objects.
>>
>>
>> Best regards
>> Christian
>>
>
> This operator DOES work on arrays/objects. The fact it also works on
> scalar values is a bonus if that's how you want to look at it :P
>
> - Davey
>
That's why I said, it would make more sense to add a new function for comparing arrays and
objects.
Why adding a new comparison operator if we could achieve the same with one or two additional
functions?
And I am not sure, if this is not already possible nowadays.
For arrays you could do: array_sum($array1) - array_sum($array2)
And for objects you can define a "sum" method on your objects or a trait e.g.
trait SummableTrait {
public function sum() {
$sum = 0;
foreach (get_object_vars($this) as $value) {
$sum += $value;
}
return $sum;
}
}
You only have to use this trait in your classes and then you can do: $object1->sum() -
$object2->sum()
Et voilà :-)
Christian
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