declare object array in typescript

1let userTestStatus: { id: number, name: string }[] = [
2    { "id": 0, "name": "Available" },
3    { "id": 1, "name": "Ready" },
4    { "id": 2, "name": "Started" }
5];
6
7userTestStatus[34978].nammme; // Error: Property 'nammme' does not exist on type [...]
8

1export class CrudService {
2  ...
3  cards: Card[] = [];
4  ...
5}

1type submitionDataType = {
2    title: string,
3    desc: string,
4    decks: Array<{ front: string, back: string }>
5}

1// Create an interface that describes your object
2interface Car {
3  name: string;
4  brand: string;
5  price: number;
6}
7
8// The variable `cars` below has a type of an array of car objects.
9let cars: Car[];

1//Define an interface to standardize and reuse your object
2interface Product {
3    name: string;
4    price: number;
5    description: string;
6}
7
8let pen: Product = {
9  name: "Pen",
10  price: 1.43,
11  description: "Userful for writing"
12}
13
14let products: Product[] = [];
15products.push(pen);
16//...do other products.push(_) to add more objects...
17console.log(products);
18/* -->
19*[
20* {
21*  name: "Pen",
22*  price: 1.43,
23*  description: "Userful for writing"
24* },
25* ...other objects...
26*]

1interface User {
2	[index: number]: {
3    	firstname: string;
4      	lastname: string;
5      	age: number;
6    }
7}