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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135
스칼라 ‘기초’ 핵심 정리를 마저 끝내자.
3.1
연산자 오버로딩?
대부분의 ‘연산자’는 실제로는 메서드다. 가장 기본적인 다음 예를 보자.
1+2
두 수 사이의 덧셈 기호가 보이는가? 그것은 메서드다.
자바에서 특별한 ‘기본
primitive
’ 타입은 실제로 스칼라에서는 일반적인 객체다. 이는
Float
,
Double
,
Int
,
Long
,
Short
,
Byte
,
Char
,
Boolean
타입에도 메서드가 있다는 의미다.
따라서
1
+
2
는
1
.+ (
2
)
와 같다. 인자가 하나뿐인 메서드의 경우 중위
infix
표기법에서 마침표와
괄호를 생략할 수 있다.
1
1
주_ 실제로는 연산자 우선순위로 인해 이 둘이 항상 동일하게 작동하지는 않는다.
1
+
2
*
3
=
7
이지만,
1
.+(
2
)*
3
=
9
다. 마침표는
별표(
*
)보다 먼저 묶인다. 또한 스칼라
2
.
11
이전 버전을 사용하는 경우
1
다음에 공백을 넣어야 한다. 그렇게 하지 않으면
1
.
이 항상
Double
로 해석된다.
기초를 튼튼히
CHAPTER
3
136
1
부
스칼라와의 만남
지금까지 본 것처럼, 스칼라 식별자에는 숫자나 영문이
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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.