reduce

使用异步函数对数组进行归约

使用方法

处理返回 promise 的回调函数的归约操作。

import * as _ from "radashi";

const userIds = [1, 2, 3, 4];
const api = {
  users: {
    async find(id: number) {
      return { name: `person ${id}` };
    },
  },
};

const users = await _.reduce(
  userIds,
  async (acc, userId) => {
    const user = await api.users.find(userId);
    return {
      ...acc,
      [userId]: user,
    };
  },
  {}
); // { 1: { name: 'person 1' }, 2: { name: 'person 2' }, 3: { name: 'person 3' }, 4: { name: 'person 4' } }