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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174
러닝 자바스크립트
함수에 정해진 매개변수보다 더 많은 매개변수를 전달하는 경우는 이 장 후반에서 살펴볼 겁
니다.
6.3.2
매개변수 해체
5
장에서 해체 할당에 관해 배웠듯,
매개변수
도 해체할 수 있습니다 (매개변수는 여러 면에서
변수와 거의 비슷합니다 ). 객체를 변수로 해체하는 예제를 봅시다.
function
getSentence
({
subject
,
verb
,
object
}) {
return
`${
subject
} ${
verb
} ${
object
}`;
}
const
o
= {
subject
: "
I
",
verb
: "
love
",
object
: "
JavaScript
",
};
getSentence
(
o
); // "
I
love
JavaScript
"
해체 할당과 마찬가지로 프로퍼티 이름은 반드시 유효한 식별자여야 하고, 들어오는 객체에 해
당 프로퍼티가 없는 변수는
undefined
를 할당받습니다.
배열 역시 해체할 수 있습니다.
function
getSentence
([
subject
,
verb
,
object
]) {
return
`${
subject
} ${
verb
} ${
object
}`;
}
const
arr
= [ "
I
", "
love
", "
JavaScript
" ];
getSentence
(
arr
); // "
I
love
JavaScript
"
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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.