July 2017
Beginner to intermediate
464 pages
10h 38m
Korean
Content preview from 러닝 자바스크립트: ES6로 제대로 입문하는 모던 자바스크립트 웹 개발
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233
9
장
객체와 객체지향 프로그래밍
이 예제는 자바스크립트에서 동적 디스패치를 어떻게 구현하는지 잘 보여줍니다.
car1
객체에
는
shift
메서드가 없지만,
car1
.
shift
('
D
')
를 호출하면 자바스크립트는
car1
의 프로토타입
에서 그런 이름의 메서드를 검색합니다.
car1
에
shift
메서드를 추가하면
car1
과 프로토타입
에 같은 이름의 메서드가 존재하게 됩니다. 이제
car1
.
shift
('
d
')
를 호출하면
car1
의 메서드
가 호출되고 프로토타입의 메서드는 호출되지 않습니다.
프로토타입 체인과 동적 디스패치를 항상 숙지하고 있을 필요는 없지만, 가끔 문제가 발생할
때 세부사항을 알고 있으면 도움이 됩니다.
9.2.4
정적 메서드
지금까지 우리는
인스턴스 메서드
, 즉 인스턴스에서 사용하게끔 만든 메서드를 주로 살펴봤습
니다. 메서드에는 인스턴스 메서드 외에도
정적 메서드 (클래스 메서드 )
가 있습니다. 이 메서
드는 특정 인스턴스에 적용되지 않습니다. 정적 메서드에서
this
는 인스턴스가 아니라 클래스
자체에 묶입니다. 하지만 일반적으로 정적 메서드에는
this
대신 클래스 이름을 사용하는 것이
좋은 습관입니다.
정적 메서드는 클래스에 관련되지만 인스턴스와는 관련이 없는 범용적인 작업에 사용됩니다.
예제로 자동차 식별 번호 (
VIN
)을 붙이는 메서드를 ...
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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.