add DeliverLatest

[kanat]

Hi.

DeliverLatest completes automatically when the source observable is done.

In my case I have a Repository which emits data from Cache, DB and API. I can emit from Cache first, then from DB and API. It's a sequence of distinct items.

Why I'm not using deliveryLatestCache?

• to avoid keeping subscription to viewObservable
• to avoid getting the last cache from observable, cause it can be incorrect (old)

Why I'm not using deliveryFirst?

• it will emit only first item (from Cache)

Why I'm not using deliveryReplay?

• the item sequence in ReplaySubject might be outdated and I want just to get the new sequence from Repository (it's already got own cache)

[konmik]

hi, why not just use Observable.last() operator together with deliveryFirst?

[konmik]

Oh, I understood why. I need to think a little bit :)