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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445
10
장
스칼라 객체 시스템 I
●
sealed
abstract
class
<
:
<
[-
From
, +
To
]
extends
(
From
) =
>
To
with
Serializable
From
이
To
의 서브타입이라는 증인 역할을 한다. 이에 대해서는
5
.
2
.
4
절 ‘암시적 증거 제
공하기’에서 다뤘다.
●
sealed
abstract
class
=:=[-
From
, +
To
]
extends
(
From
) =
>
To
with
Serializable
From
과
To
의 타입이 같다는 증인 역할을 한다. 이에 대해서는
5
.
2
.
4
절 ‘암시적 증거 제공
하기’에서 다뤘다.
●
type
Manifest
[
T
] =
reflect
.
Manifest
[
T
]
JVM
의 타입 소거에서 사라질 수 있는 타입 정보를 유지하기 위해 사용한다. 비슷한 타입
으로
OptManifest
가 있다. 이에 대해서는
24
.
2
.
2
절 ‘클래스 태그, 타입 태그, 매니페스트’
에서 설명할 것이다.
scala
.
collection
.
immutable
.
List
(
http
://
bit
.
ly
/
1toub3N
)와 같은 다른 타입도
Predef
내에 내포된 임포트를 통해 가시 영역으로 들어온다. 또한 일부 타입의 동반 객체도 사용자가 볼
수 있게 만든다. 예를 들어
=
:
=
(
http
://
bit
.
ly
/
13p4bvs
),
Map
(
http
://
bit
.
ly
/
108flme
),
Set
(
http
://
bit
.
ly
/
10FtE2s
) 등이 그런 객체다.
10.5.3
조건 검사 메서드
어떤 조건이 참인지 단언문을 만들어야 할 필요가 있다. 아마도 ...
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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.