개발에 AtoZ까지

◆목표 DOM의 정의 웹브라우저 동작과정 BOM의 정의 1. DOM(Document Object Model)의 정의 -구조화된 문서(Document)를 객체로 표현하는 방식 2. 웹브라우저 동작 과정 1) HTML 파일을 웹서버로 부터 가져옴 2) 가져온 HTML 파일을 파싱(Parsing) 하여 Dom Tree 생성, Css 정보를 파싱(Parsing)하여 Cssom Tree 생성 3) 파싱한 Dom Tree와 Cssom Tree를 기반으로 Render Tree를 생성 4) 생성한 Render Tree로 Rendering을 하고 그것으로 사용자에게 페이지를 보여줌 Tip) 자바스크립트 선언 위치 - HTML 코드를 기반으로 DOM 트리를 구성하기 때문에 DOM 트리를 구성하기 전에 자바 스크립트로 HT..

1. 문제 We have a list of points on the plane. Find the K closest points to the origin (0, 0). (Here, the distance between two points on a plane is the Euclidean distance.) You may return the answer in any order. The answer is guaranteed to be unique (except for the order that it is in.) Example 1: Input: points = [[1,3],[-2,2]], K = 1 Output: [[-2,2]] Explanation: The distance between (1, 3) and ..

1. 문제 You are given a license key represented as a string S which consists only alphanumeric character and dashes. The string is separated into N+1 groups by N dashes. Given a number K, we would want to reformat the strings such that each group contains exactly K characters, except for the first group which could be shorter than K, but still must contain at least one character. Furthermore, ther..

1. 문제 You're given strings J representing the types of stones that are jewels, and S representing the stones you have. Each character in S is a type of stone you have. You want to know how many of the stones you have are also jewels. The letters in J are guaranteed distinct, and all characters in J and S are letters. Letters are case sensitive, so "a" is considered a different type of stone from..