SOURCE

/*
请实现find函数，使下列的代码调用正确。
约定：
 
title数据类型为string
userId为主键，数据类型为number
*/

var data = [
  { userId: 8, title: "title1" },
  { userId: 11, title: "other" },
  { userId: 15, title: null },
  { userId: 19, title: "title2" },
];

var find = function (origin) {
  //请补充你的代码
  let data = origin;
  const result = {
    where: function (reg) {
      const res = data.filter((value) => {
        return reg["title"].test(value["title"]);
      });
      data = res;
      return this;
    },
    orderBy: function (key, method) {
      data.sort((a, b) => {
        //降序
        if (method === "desc") {
          return b[key] - a[key];
        } else {
          return a[key] - b[key];
        }
      });
      return data;
    },
  };
  return result;
};

//查找data中，符合条件的数据，并进行排序
var result = find(data)
  .where({
    title: /\d$/,
  })
  .orderBy("userId", "asc");

console.log(result); // [{ userId: 19, title: 'title2'}, { userId: 8, title: 'title1' }];