Is it possible to directly declare multiple variables within an array in TypeScript?

I am looking to simplify my variable declaration process for an array in my Angular 8 project using TypeScript.

Currently, my code looks like this:


export class GridComponent {

  pizza0: Pizza;
  pizza1: Pizza;
  pizza2: Pizza;
  pizza3: Pizza;
  pizza4: Pizza;
  pizza5: Pizza;

  constructor() {}

}

interface Pizza {
 name: string;
 ingredients: number;
 price: string;
}

I want to streamline this process by doing something like:


PizzaList: Array<Pizza> = new Array<Pizza>(pizza0, pizza1, pizza2, pizza3, pizza4, pizza5);


interface Pizza {
 name: string;
 ingredients: number;
 price: string;
}

Each variable should be declared initially within the array.

arraystypescriptdeclaration

Answer №1

In order to have pizzaList represent an array of Pizza objects, you can define it like this:

const pizzaList: Array<Pizza> = [
    { name: 'Pepperoni', ingredients: 1200, price: 10.99 },
    { name: 'Vegetarian', ingredients: 1000, price: 8.99 }
];

If you're looking to specify a fixed length array of 6 Pizza objects, unfortunately, that is not supported. You can only declare it as an array of pizzas without specifying a specific length.

Answer №2

There is no need to initialize the array using new Array<T>.

If you already have predefined values, you can simply do it this way:

PizzaList: Array<Pizza> = [pizza0, pizza1, pizza2, pizza3, pizza4, pizza5];

Alternatively, you can create the values like this:

PizzaList: Array<Pizza> = [
    new Pizza(/*args*/),
    new Pizza(/*args*/),
    new Pizza(/*args*/)
];

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