Subscribing to arrays

[DavidMulder0]

I understand why subscribe(store.arrayOfValues, ...) breaks when store.arrayOfValues = [...] is assigned. I also understand why subscribeKey(store, 'arrayOfValues') doesn't trigger when store.arrayOfValues.push(...) is used. To handle both interactions with store.arrayOfValues you thus get this 'crazy' dance of having to do the subscribe inside (and outside) your subscribeKey handler... which gets messy (the messy part is in particular the unsubscribe handling, do I need to unsubscribe? Now that I think about it I probably don't?).

What I basically wanted to ask is: Am I doing this wrong? How are you guys handling this? Before looking at the implementation of subscribeKey I was expecting it to fire on anything happening 'inside' the key as well. Right now I am thinking of just creating my own subscribeKey handler with a flag whether or not to subscribe to the targeted object, but wanted to ask around first.

[dai-shi]

If you want to accept both = [...] and .push(), I'd recommend to subscribe to the root store. subscribeKey is meant for primitive values, and it's a simple helper function, and it doesn't add any performance benefit compared to subscribe from the proxy perspective (it can reduce calling callbacks.)

My preference for mutable array is to use .splice(0, len, ...), and subscribe(store.arrayOfValues), which is better in performance.