function join<sdq>(one: sdq, two: sdq) {
  return `${one}${two}`;
}
join <string> ("我叫", "史迪奇");

// 定义数组
function MyName<SDQ>(params: Array<SDQ>) {
  return params;
}
MyName <string> (["626", "626"]);

// 定义多个泛型
function join<sdq, sdz>(one: sdq, two: sdz) {
  return `${one}${two}`;
}
join < number, string > (626, "626");

class Syp <sdq> {
  constructor(private syps: sdq[]) {}
  getSyp(index: number): sdq {
    return this.syps[index];
  }
}

const syp = new Syp(["史迪奇", "鲁本", "安琪"]);
console.log(syp.getSyp(1));

interface SDQ{
  name:string;
}

// 继承SDQ
class Syp <sdq extends SDQ> {
  constructor(private syps: sdq[]) {}
  getSyp(index: number): string {
    return this.syps[index].name;
  }
}

const syp = new Syp([
  {name:"史迪奇"},
  {name:"鲁本"},
  {name:"安琪"}
]);
console.log(syp.getSyp(0));

// 约束: 要么是number要么是string
class Syp <sdq extends number | string> {
  constructor(private syps: sdq[]) {}
  getSyp(index: number): sdq {
    return this.syps[index];
  }
}

const syp = new Syp <string>(["史迪奇", "鲁本", "安琪"]);
console.log(syp.getSyp(1));