hknab

const CustomPromiseState = {
  PENDING: "PENDING",		
  RESOLVED: "RESOLVED",
  REJECTED: "REJECTED",
};
class CustomPromise {
  constructor(fn) {
    this.CustomPromiseState = CustomPromiseState.PENDING;
    this.resolver = this.resolver.bind(this);
    this.rejector = this.rejector.bind(this);

hknab

function memoization(func) {
  let cache = new Map();
  const getData = () => {
    if (cache[func]) {
      console.log("cache");
      return cache[func];
    } else {
      cache[func] = func();
      console.log("not cache");
      return cache[func];