July 2016
Beginner to intermediate
776 pages
17h 26m
Korean
Content preview from 프로그래밍 스칼라: 실용적인 스칼라 활용법을 익히는 가장 확실한 실전 바이블 (2.11.x 버전 기반)
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518
2
부
기본기 다지기
val field2
=
privateClass4
.
field2
}
}
package scopeB
{
class PrivateClass1B extends scopeA
.
PrivateClass1
{
val field1
=
privateField
//
오류
val privateClass1
=
new scopeA
.
PrivateClass1
val field2
=
privateClass1
.
privateField
//
오류
}
}
위 파일은
3
개의 오류가 발생한다.
scopeA
로 영역이 지정된 멤버를 그와 관련 없는 패키지인
scopeB
에서 접근하려 시도하면 오류
가 발생한다. 또한 내포된 패키지인
scopeA2
의 멤버 중 그 패키지(
scopeA2
)로 영역을 한정시
킨 멤버를 바깥에서 접근하려 하는 경우에도 오류가 발생한다.
TIP
타입이나 멤버를 그 타입이나 멤버를 둘러싼 패키지
P
가 영역인
private
[
P
]로 선언한 경우에는 자바의 패키
지 전용 가시성과 동일하다.
13.7
가시성에 대한 마지막 고찰
스칼라의 가시성 선언은 매우 유연하며 일관성이 있다. 가시성 지정을 사용하면 인스턴스 수준
(
private
[
this
]
)으로부터 패키지 수준(
P
가 패키지인
private
[
P
]
)에 이르는 모든 영역에 대
해 세밀한 가시성 제어가 가능하다. 예를 들어 이런
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.