If you think that's what the code is doing, why do you keep all the old values in an array in memory? And yes I can think of a way of doing this, it's more or less the same as yours, just without the storing ALL the values part.
If you think that's what the code is doing, why do you keep all the old values in an array in memory? And yes I can think of a way of doing this, it's more or less the same as yours, just without the storing ALL the values part.