In reactive programming, cold observable starts emitting values only when observers have subscribed to it.
I have a question in this context.
Suppose I subscribe S1 on observable O at time T1, and hence S1 starts receiving values.Then I subscribe S2 on O at time T2.
Would S2 receive values emitted by O between T1 and T2?
The short answer is that S2 would receive values only from time T2.
There are several operators you can use that will replay emitted values. You can use a combination of replay(), publish(), refCount(), etc, to allow replaying values between T1 and T2. Here is a good overview of cold versus hot observables.
