[RxSwift] Filtering Operator (distinctUntilChanged)

DistinctUntilChanged

연달아 같은 값이 오면 생략한다.

Observable.of(1, 2, 2, 1, 3)
   .distinctUntilChanged()
   .subscribe(onNext: {
       print($0)
   })
   .disposed(by: disposeBag)

/* Prints :
 1
 2
 1
 3
/*