Combining observables

There might be times where we have two distinct observables that emit data at different times. We may, in this scenario, wish to combine both of these observables so that we still effectively have one Observable that our subscribers can subsequently subscribe to.

If we imagine a stock trading program that places stock trades based off breaking news, then you would probably have multiple observables both watching for new news posts and then emitting these events to other components within our system. In this scenario, we could effectively aggregate all these observables into one golden news source that could effectively feed the rest of our stock trading program.

When it comes to actually implementing the component that combines our observables, we could leverage a number of different operators available to us within RxPY. These are as follows:

• And()/Then()/When()

• CombineLatest()

• Join()

• Merge()

• StartWith()

• Switch()

• Zip()

It's worth playing around with these and trying to fully understand them as each of them can be leveraged differently within your programs.