Sums array of objects/numbets via callable function
Let's assume we have any object of any class with some numeric value inside. We have an array of that objects, and we have to calculate a sum of those numeric values.
Let's this be our class
class Num{
private $value;
public function __construct(int $number){
$this->value = $number;
}
public function getValue(){
return $this->value;
}
}
we have array of items of 'Num' class
$items = [
new Num(1),
new Num(2),
new Num(3),
];
Let's use array_sum_callable to calculate sum of that numbers
array_sum_callable($items, function($item){
return $item->getValue();
});
Result will of course be: 6
Returns the sum of values as an integer or float; 0 if the array is empty.
via Composer:
composer require outcloud/php-array-sum-callable
function will be registered in global namespace.