전체 글171 [ JavaScript ] null vs undefined vs undeclared null undefined undeclared null 값이 명시적으로 할당된 것 변수는 선언되었지만, 값이 할당되지 않은 변수 var,let,const 를 사용해서 생성되지 않은 식별자에 값을 할당할 때 생성 명시적 암시적 strict 모드에선 referenceError 나온다 https://inpa.tistory.com/entry/%F0%9F%93%9A-null-undefined-NaN 2023. 10. 26. [ JavaScript ] 객체 & 내장객체 & 호스트객체 보호되어 있는 글 입니다. 2023. 10. 26. [ TypeScript ] Props 타입 지정하기 interface SectionContainerProps { newsArr : NewsData[] ; } export default function SectionContainer({newsArr}:SectionContainerProps) { ... } export default function SectionContainer({newsArr}:{newsArr:NewsData[]}) { } export default function SectionContainer({newsArr}) { const newsData = newsArr as NewsData[] // 사용할 데이터 이름으로 변수 선언 ... } 2023. 10. 26. Hydration 보호되어 있는 글 입니다. 2023. 10. 26. [ EVERYTHING YOU NEED TO ACE COMPUTER SCIENCE AND CODING IN ONE BIG FAT NOTEBOOK ] Computing Systems - ch3 Chapter 3 1. Human-Computer Interaction(HCI) : part of computer science that studies and improves how the user works with computers - The User Interface(UI) : - all parts of computing system you use to operate the computer - easy for all people to use (including who are blind, low vision, deaf, hard of hearing) - Graphical User Interface(GUI) : -a type of user interface that uses icons and symbo.. 2023. 10. 26. [ EVERYTHING YOU NEED TO ACE COMPUTER SCIENCE AND CODING IN ONE BIG FAT NOTEBOOK ] Computing Systems - ch2 Chapter 2. 1. Computer stores, shares, and analyzes huge amounts of data & perform complex math calculations 2. Computers over time - Abacus(thousands years ago): help people calculate - computer meant profession person who makes calculations ( in the 1600s) and they used the Slife Rule to caculate - Colossus Mark 1(in 1944, during World War 2) used by British government to crack secret German c.. 2023. 10. 26. 이전 1 ··· 18 19 20 21 22 23 24 ··· 29 다음
