如何在typescript中声明集合？

let numbers: number[] = [1, 2, 3, 4];
let strings: string[] = ["a", "b", "c"];

let numbers: Array<number> = [1, 2, 3, 4];
let strings: Array<string> = ["a", "b", "c"];

let tuple: [string, number] = ["hello", 10];

let setOfNumbers: Set<number> = new Set([1, 2, 3, 4]);
let setOfStrings: Set<string> = new Set(["a", "b", "c"]);

let mapOfNumbersToStrings: Map<number, string> = new Map([
  [1, "one"],
  [2, "two"],
  [3, "three"]
]);

let obj: { [key: string]: number } = {
  a: 1,
  b: 2,
  c: 3
};

// 数组
let numbers: number[] = [1, 2, 3, 4];
console.log(numbers);

// 元组
let tuple: [string, number] = ["hello", 10];
console.log(tuple);

// Set
let setOfNumbers: Set<number> = new Set([1, 2, 3, 4]);
setOfNumbers.add(5);
console.log(setOfNumbers);

// Map
let mapOfNumbersToStrings: Map<number, string> = new Map([
  [1, "one"],
  [2, "two"],
  [3, "three"]
]);
console.log(mapOfNumbersToStrings.get(1)); // 输出: one

// 对象
let obj: { [key: string]: number } = {
  a: 1,
  b: 2,
  c: 3
};
console.log(obj.a); // 输出: 1