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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438
2
부
기본기 다지기
잘못된 인자에 대해 예외를 던지지 않았다. 하지만
sbt
는 우리가
exit
를 호출했다는 것을 맘에
들지 않아 한다.
10.4
Product
, 케이스 클래스, 튜플
여러분의 케이스 클래스에
scala
.
Product
(
http
://
bit
.
ly
/
1voMO4r
)를 혼합할 수 있다. 그 트
레이트는 인스턴스의 필드에 작용할 수 있는 일반적인 메서드를 몇 가지 제공한다. 여기서는 예
제로
Person
인스턴스를 사용한다.
scala
>
case class Person
(
name
:
String
,
age
:
Int
)
defined class Person
scala
>
val p
:
Product
=
Person
("
Dean
",
29
)
p
:
Product
=
Person
(
Dean
,
29
)
//
이
케이스
클래스
인스턴스를
Product
타입의
변수에
대입할
수
있다
.
scala
>
p
.
productArity
//
필드의
개수
res0
:
Int
=
2
scala
>
p
.
productElement
(
0
)
//
원소
중
0
번째에
있는
값
(
0
이
첫
번째
)
res1
:
Any
=
Dean
scala
>
p
.
productElement
(
1
)
res1
:
Any
=
29
scala
>
p
.
productIterator foreach println
Dean
29
필드에 접근할 수 있는 일반적인 방법이 있으면
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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.