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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267
5
장
암시
implicit def urlToProcess
(
url
:
URL
):
URLBuilder
=
...
implicit def stringToProcess
(
command
:
String
):
ProcessBuilder
=
...
implicit def stringSeqToProcess
(
command
:
Seq
[
String
]):
ProcessBuilder
=
...
휴! 꽤 긴 목록이다. 하지만 이 목록을 대강 살펴보고 나서 스칼라 라이브러리가 암시를 어떻게
활용하고 지원하는지 감을 잡을 수 있었으면 한다.
5.8
암시를 현명하게 활용하기
암시적 인자 기법은
DSL
을 만들거나, 준비 코드를 최소화한
API
를 만들 때 상당히 유용한 도
구다. 하지만 이런
API
나
DSL
에 전달된 암시적 인자와 값은 거의 눈에 띄지 않기 때문에 코드
를 이해하기가 상당히 어렵다. 따라서 암시적 인자를 현명하게 사용해야 한다.
암시를 눈에 잘 띄게 만드는 방법 하나는 암시적 값을 모두
implicits
라는 패키지나
Implicits
라는 객체에 넣는 관례를 따르는 것이다. 이런 방식을 사용하면, 코드 사용자가 ‘
implicit
’라는
단어를 임포트 문에서 보고, 스칼라에서 많이 사용되는 기본 암시와 더불어 다른 암시를 추가
로 사용 중임을 알 수 있다. 다행히 요즘의
IDE
는 사용 ...
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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.
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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.