小编Pao*_*der的帖子

假设我们有一堂课：

class Foo {
  var1: string = 'var1';
  var2: string = 'var2';

  hello(request: A): Promise<B> {  }

  world(request: C): Promise<D> {  }
}

我想实现执行以下实例方法的函数Foo：

const foo = new Foo();
const executeFoo = (methodName: string, firstParam: any) => { // <- I'm stuck in this arrow function.
  return foo[methodName](firstParam);
};

executeFoo('hello', testParam); // testParams is type of A, then return type should Promise<B>.
executeFoo('world', testParam2); // testParams2 is type of C, then return type should Promise<D>.

有没有办法定义 的类型executeFoo …