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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298
2
부
기본기 다지기
Seq
에 대한 논의를 마치기 전에 여러분이 알아두어야 할 중요한 구현상의 문제가 있다. 불변 컬
렉션의 사용을 장려하기 위해
Predef
(
http
://
bit
.
ly
/
1086O2z
)와 다른 타입에서는 몇몇 불변
컬렉션 타입을 노출시킨다. 따라서 명시적으로 임포트나 전체 패키지 경로를 사용하지 않고도 불
변 컬렉션을 사용할 수 있다.
List
(
http
://
bit
.
ly
/
1toub3N
)나
Map
(
http
://
bit
.
ly
/
15y3BGn
)
이 그런 예다.
하지만
Predef
는
scala
.
collection
.
Seq
(
http
://
bit
.
ly
/
1E8xLCt
)도 영역 안으로 가져온다.
그리고 이 경우에는 불변 컬렉션만 노출시킨다는 원칙을 깬다.
scala
.
collection
(
http
://
bit
.
ly
/
1DDiLKu
)에 있는 타입은 불변인
immutable
(
http
://
bit
.
ly
/
1wQxSBO
) 컬렉션이나 변
경 가능한
mutable
(
http
://
bit
.
ly
/
1wl4TEy
) 컬렉션이 모두 공유하는 추상화다.
scala
.
collection
.
immutable
.
Seq
(
http
://
bit
.
ly
/
1wQxTWe
)가 있음에도 불구하고 (이는
scala
.
collection
.
Seq
의 서브클래스다 ), 그 대신
scala
.
collection
.
Seq
를 노출시키는 이
유는 ...
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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.