kikimora
Joined 9 years ago
Joined 9 years ago
https://carnewschina.com/2025/05/13/xiaomi-su7-finished-dead...
I really like how the car looks. But this and famous crash on track due to brakes issue…
This is not about duplicates. For example, sync updates 100 items in a list changing their titles. Items are bound to a list in the UI. Thus, 100 unique title update events triggered.
>Events are only used in the M→V communication
I don’t understand. Button clicked -> model change -> view update -> new event triggered -> model or view updated again … This is not something one would code on purpose, but often an attempt to create relationships between view. Like a custom layout code. Might not include model at all, just views being updated in an event handler trigger more events and more updates to views.
How do you collect all notifications on step 2 to fire them on step 3 such that UI does not re-render itself too much? E.g. updating a title of each item in a list of 100 items should not trigger 100 renders. Or 100 layout calculations (which I think is harder to avoid).
How do you deal with situations where on step 4 UI triggers an event that your model happens to listen and the cycle repeats while killing performance?
Because you rely on events how do you avoid “event hell”? That is, a situation when an event handler triggers a change that triggers another event handler that triggers a change and so on. Sometimes it is scrolling or typing, sometimes it is parts of the model subscribed to each other bubbling events to UI.