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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506
2
부
기본기 다지기
13.3
공개 가시성
가시성 키워드가 없는 모든 선언은 ‘공개’다. 즉, 어디서나 볼 수 있다. 스칼라에는
public
이라
는 키워드가 없다. 이 부분은 자바와 다르다. 자바에서는 아무 키워드도 안 붙으면 자신을 둘러
싼 패키지에서만 볼 수 있도록 제한하는 공개 상태다 (즉, 패키지 전용 ). 루비 등의 다른 객체지
향 언어도 공개 가시성을 기본으로 제공한다.
2
//
src
/
main
/
scala
/
progscala2
/
visibility
/
public
.
scala
package scopeA
{
class PublicClass1
{
val publicField
=
1
class Nested
{
val nestedField
=
1
}
val nested
=
new Nested
}
class PublicClass2 extends PublicClass1
{
val field2
=
publicField
+
1
val nField2
=
new Nested
().
nestedField
}
}
package scopeB
{
class PublicClass1B extends scopeA
.
PublicClass1
class UsingClass
(
val publicClass
:
scopeA
.
PublicClass1
)
{
def method
=
"
UsingClass
:"
+
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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.