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What is the FlatMap Operator in RxSwift?

FlatMap Operator

RxSwift: FlatMap Operator

.flatMap { }

  • Projects and transforms the observable values of an Observable via a supplied predicate and then flattens them down to a single observable.
  • Useful to filter out nil.
  • Only emits values of an observable when then observable completes.

flatMap { YY -> XX}


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