JavaScript How to groupBy a typescript array with a Key of an object inside that array? groupby typescript array,typescript groupby array of objects,typescript group

I have an array products that needs to be grouped by Product._shop_id.

export class Product {
    _id: string;
    _shop_id: string;
}

export class Variant { variant_id: string; }

export interface ShoppingCart {
    Variant: Variant;
    Product: Product;
    quantity: number;
    totalPrice: number;
}

export class CartComponent implements OnInit {
    products: ShoppingCart[] = [];

    ngOnInit(){
      this.products = [
                        {Variant: {variant_id: '1'}, Product: {_id: '1', _shop_id:'1'}, quantity: 5, totalPrice: 600},
                        {Variant: {variant_id: '2'}, Product: {_id: '2', _shop_id:'2'}, quantity: 4, totalPrice: 500},
                        {Variant: {variant_id: '5'}, Product: {_id: '3', _shop_id:'2'}, quantity: 3, totalPrice: 400}
                      ]
    }

    someMethod(){
      const productsByShop = this.utils.groupBy(this.products, key);
    }
}
Answer:1

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