포시코딩

추상 클래스 (Abstract class) 추상 클래스 사용 예시 abstract class User { constructor ( protected firstName: string, protected lastName: string ) {} abstract sayHi(name: string): string abstract fullName(): string } class Player extends User { fullName(): string { return `${this.firstName} ${this.lastName}` } sayHi(name: string): string { return `Hello ${name}. My name is ${this.fullName()}` } } 추상 클래스인 User 클..

readonly TypeScript type Words = { [key: string]: string } class Dict { private words: Words constructor() { this.words = {} } add(word: Word) { if (this.words[word.term] === undefined) { this.words[word.term] = word.def; } } def(term: string) { return this.words[term]; } } class Word { constructor ( public term: string, public def: string ) {} } const kimchi = new Word('kimchi', '한국의 음식'); cons..