var map = new Map();
map.set('1', 'Ail');
map.set(1, 'testvalue');
console.log( "Value 1= " + map.get(1));
console.log( "Key is Present in the Map = " + map.has(3) );
console.log( "Delete value from Map = " + map.delete(1) );
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dattiloscritto dichiarare array di mappe
type Product = { productId: number; price: number; discount: number };
let myarray: Product[];
let priceListMap : Map<number, Product[]> = new Map<number, Product[]>();