Flow-js:如何创建一个与数组和对象的交集一致的变量

Question

我对mysql有一个有效的flow-js定义：

declare type QueryResults = Array<Object> &{
    insertId?: string | number,
    affectedRows?: number,
    changedRows?: number
};

我试着创建一个与这个定义一致的变量。(You can try it here)：

/* @flow */
type A = Array<Object>
type B = {
    insertId?: string | number,
    affectedRows?: number,
    changedRows?: number
  }
type C = A & B;


let a1: A = []
let a2: A = [{}]

let b1: B = {}
let b2: B = {insertId: 3}

let c: C 
c = [] // Error, not complient with B
c.insertId = 5 // Error, not complient with A

Answer 1

我刚发现see here

c = {}.extend([])