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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195
7
장
스코프
// 스코프 안에 있습니다.
y
.
color
= "
red
";
console
.
log
(
z
); //
3
;
z
는 숨겨지지 않았습니다.
}
console
.
log
(
x
.
color
); // "
red
"; 객체는 내부 스코프에서 수정됐습니다.
console
.
log
(
y
.
color
); // "
red
";
x
와
y
는 같은 객체를 가리킵니다.
console
.
log
(
z
); //
3
}
외부 스코프에 있는 같은 이름의 변수에 그늘이 진 듯 만든다는 의미에서 변수 숨김을 변수
섀도
우
shadowing
라 부르기도 합니다. 하지만 그늘이 진다 해도 완벽히 가려지는 것이 아니라 어두워질 뿐이므로 필
자는 이 용어를 사용하지 않습니다. 변수를 숨기면 그 변수는 해당 이름으로는 절대 접근할 수 없습니다.
이제 스코프가 계층적임을 이해했을 겁니다. 이전 스코프를 떠나지 않아도 새 스코프에 진입할
수 있습니다. 스코프의 계층적인 성격 때문에 어떤 변수가 스코프에 있는지 확인하는
스코프
체인
scope
chain
이란 개념이 생겼습니다. 현재 스코프 체인에 있는 모든 변수는 스코프에 있는 것
이며, 숨겨지지 않았다면 접근할 수 있습니다.
7.6
함수, 클로저, 정적 스코프
지금까지는 블록으로만 스코프를 설명했으므로 정적 스코프를 파악하기 ...
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and much more.
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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.