RX Java – create an observable by combining other observables, and issue events from the first sampling

• Java

When one is an infinite data source, I need to combine two observers, and the other is an indicator that obtains the last value from the first one

I saw it http://reactivex.io/documentation/operators.html#combining But none of them met my requirements

Solution

This can be easily achieved using flatmap:

observable2
    .flatMap(value -> observable1.take(1))
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