November 2022
Beginner to intermediate
544 pages
12h 39m
Korean
Content preview from 자바에서 코틀린으로
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314
자바에서 코틀린으로
예제
15.37
[
encapsulated
-
collections
.
15
:
src
/
main
/
java
/
travelator
/
itinerary
/
Itinerary
.
kt
]
data class Itinerary(
val id: Id<Itinerary>,
val route: Route
) : Route by route {
fun withTransformedRoute(transform: (Route).() -> Route) =
copy(route = transform(route))
...
}
결과적으로, 변환한
Route
를 새로 만드는 것과 거의 비슷한 정도로 쉽게 변환된
Itinenary
를
만들 수 있다.
예제
15.38
[
encapsulated
-
collections
.
15
:
src
/
main
/
java
/
travelator
/
itinerary
/
itineraries
.
kt
]
fun Itinerary.withoutJourneysBy(travelMethod: TravelMethod) =
withTransformedRoute {
filterNot { it.method == travelMethod }
}
fun Itinerary.withoutLastJourney() =
withTransformedRoute { dropLast(1) }
15.4
다음으로 ...