数组

搭配接口

interface IStudents {
  name: string;
  gender: boolean;
}

let people: Array<IStudents> = [
  { name: "alice", gender: false },
  { name: "Bob", gender: true }
];

类数组

事实上常用的类数组都有自己的接口定义，如 IArguments, NodeList, HTMLCollection 等：

function sum(a, b, c) {
  let sum: number = 0;
  let args: IArguments = arguments;
  for (let i: number = 0; i < args.length; i++) {
    sum += args[i];
  }
  return sum;
}

const res: number = sum(1, 2, 3);
console.log(res); //6