yanzhihong23

function fetchData(x) {
  return new Promise((resolve, reject) => {
    // mock
    if (x == 3 || x == 4 || x == 5) {
      reject('error');
    } else {
      resolve(x);
    }
  });
}

yanzhihong23

function curry(fn) {
  var res;
  function curried() {
    args = [].slice.call(arguments);

    if (!res && args.length == fn.length) {
      res = fn.apply(this, args);
      return curried;
    } else if (!res && args.length > fn.length) {
      res = fn.apply(this, args);

yanzhihong23

const cookie = document.cookie.split('; ').reduce((a, b) => {
  const arr = b.split('=');
  const obj = {[arr[0]]: arr[1]};
  return Object.assign(a, obj);
}, {});

yanzhihong23

class LRUCache {
	constructor(size) {
		this.size = size;
		this.cache = new Map();
	}

	put(key, value) {
		const { cache, size } = this;
		if(cache.has(key)) {
			cache.delete(key);