February 2022
Beginner to intermediate
784 pages
24h 53m
Korean
Content preview from 자바스크립트 완벽 가이드
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JavaScript
70
4장 표현식과 연산자
4.1
가장 단순한 표현식을 기본 표현식이라 부릅니다. 이는 단독으로 존재하며 자신보
다 더 단순한 표현식을 포함하지 않습니다. 자바스크립트의 기본 표현식은 상수나
리터럴 값, 일부 키워드, 변수 참조가 있습니다.
리터럴은 문자 그대로 쓰는 값입니다. 리터럴은 다음과 같은 형태입니다.
1.23 //
숫자
리터럴
"hello" //
문자열
리터럴
/pattern/ //
정규
표현식
리터럴
자바스크립트의 숫자 리터럴 문법은 3.2절에서 설명했습니다. 문자열 리터럴은
3.3절에서 설명했습니다. 정규 표현식 리터럴 문법은 3.3.5절에서 소개했고 11.3절
에서 더 자세히 설명합니다.
자바스크립트 예약어 중에도 기본 표현식이 있습니다.
true //
불
true
로
평가됩니다
.
false //
불
false
로
평가됩니다
.
null // null
로
평가됩니다
.
this // '
현재
'
객체로
평가됩니다
.
true
,
false
,
null
에 대해서는 3.4절, 3.5절에서 배웠습니다.
this
는 다른 키워드와
달리 일정한 값이 아니며 프로그램에서 사용한 위치에 따라 다른 값으로 평가됩니
다.
this
키워드는 객체 지향 프로그래밍에서 사용됩니다. 메서드 바디에서
this
는
해당 메서드를 호출한 객체로 평가됩니다. 4.5절, 8장(특히 ...
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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.