타입스크립트 Typescript 제네릭

Typescript

// Generic

function getSize<T>(arr: T[]): number {

    return arr.length;

}

const arr1 = [1, 2, 3];

getSize<number>(arr1);

const arr2 = ["1", "2", "3"];

getSize<string>(arr2);

interface Mobile<T> {

    name: string;

    price: number;

    option: T;

}

const m1: Mobile<{ color: string; coupon: boolean; }> = {

    name: "s21",

    price: 1000,

    option: {

        color: "red",

        coupon: false,

    }

}

const m2: Mobile<string> = {

    name: "s20",

    price: 900,

    option: "good"

}

interface User {

    name: string;

    age: number;

}

interface Car {

    name: string;

    color: string;

}

const user: User = { name:"a", age:10 };

const car: Car = { name:"bmw", color:"red" };

function showName<T extends { name: string }>(data: T): string {

    return data.name;

}

showName(user);

showName(car);