Another option is to lazily calculate it:
class Category
{
private $total;
public function getTotal()
{
if ($this->total === null) {
$this->total = // calucate it here
}
return $this->total;
}
}
--
Jasper N. Brouwer
(@jaspernbrouwer)
On 21 November 2014 at 12:16:43, [email protected]
([email protected]) wrote:
> i don't will like create a column, because that attribute can change accord
> with period the attribute $date.
>
> class Operation {
> $description;
> $value;
> $date;
> }
>
> Ex:
>
> category: fuel in jun/2014 ($total = 100.00)
> category: fuel in jul/2014 ($total = 150.00)
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