Let's say we have two values:
A - quite complex calculation C - constant B = A + C
On the screen there is value B and user can change it (normal texbox). When B changes, A changes as well because C is constant. So there is linear dependency between A and B.
old A + 10. He says this is dirty, because it's duplication of code (we make use of the fact that they are dependent and according to him that should be only in one place in our app). I understand it's not ideal, but making AJAX request after every key press seems a bit too much.
It's a really small thing and I would not post if we haven't had long discussion about it.
How do you deal with such problems? Also I can imagine that using knockout implies lots of calculations on the client side, which very often leads to duplication of the same calculations from the back-end. Does anyone have links to some articles/thoughts on this topic?