Transforming Operator

1. toArray()

2. map

3. flatMap

let disposeBag = DisposeBag()

protocol 선수 {
    var 점수 : BehaviorSubject<Int> { get }
}

struct 양궁선수 : 선수 {
    var 점수 : BehaviorSubject<Int>
}

let 한국양궁선수 = 양궁선수(점수: BehaviorSubject<Int>(value: 10))
let 미국양궁선수 = 양궁선수(점수: BehaviorSubject<Int>(value: 8))

let 올림픽경기 = PublishSubject<선수>()

올림픽경기
    .flatMap{선수 in
        선수.점수
    }
    .subscribe(onNext:{
        print($0)
    })
    .disposed(by: disposeBag)

print("한국양궁선수 초기값")
올림픽경기.onNext(한국양궁선수)
print("한국양궁선수 다음 값")
한국양궁선수.점수.onNext(9)

//출력 
//10
//9

5. materialize

6. dematerialize

例電話番号入力コード(総合練習)

let disposeBag = DisposeBag()

let input = PublishSubject<Int?>()

let list: [Int] = [1]

input
    .flatMap{
        $0 == nil ? Observable.empty() : Observable.just($0)
    }
    .map{ $0! }
    .skip(while: {$0 != 0})
    .take(11) //010-6676-2789
    .toArray()
    .asObservable()
    .map {
        $0.map {"\($0)"}
    }
    .map { numbers in
        var numberList = numbers
        numberList.insert("-", at: 3)
        numberList.insert("-", at: 8)
        let number = numberList.reduce(" ",+)
        return number
    }
    .subscribe(onNext:{
        print($0)
    })
    .disposed(by: disposeBag)

input.onNext(0)
input.onNext(1)
input.onNext(0)
input.onNext(6)
input.onNext(6)
input.onNext(7)
input.onNext(6)
input.onNext(2)
input.onNext(7)
input.onNext(8)
input.onNext(9)

//010-6676-2789