Go7hic

@kangax's ES6 quiz, explained

@kangax created a new interesting quiz, this time devoted to ES6 (aka ES2015). I found this quiz very interesting and quite hard (made myself 3 mistakes on first pass).

Here we go with the explanations:

Question 1:

(function(x, f = () => x) {

Go7hic

JavaScript  15 hrs 55 mins █████████████▎░░░░░░░  63.4%
JSX         6 hrs 15 mins  █████▏░░░░░░░░░░░░░░░  24.9%
JSON        1 hr 3 mins    ▉░░░░░░░░░░░░░░░░░░░░   4.2%
LESS        57 mins        ▊░░░░░░░░░░░░░░░░░░░░   3.8%
HTML        28 mins        ▍░░░░░░░░░░░░░░░░░░░░   1.9%

Go7hic

window.companies = [
    {
        "companyId": 35559,
        "companyShortName": "亲宝宝",
        "companyFullName": "杭州点望科技有限公司",
        "companyLogo": "i/image2/M01/CC/83/CgotOVw1nYCAXKG1AACh6SsABbA834.jpg",
        "address": "杭州西湖区紫荆花路2号联合大厦B座3F亲宝宝",
        "location": "120.097822,30.266052",
        "district": "西湖区",
        "financeStage": "C轮",

Go7hic

Keybase proof

I hereby claim:

• I am dyygtfx on github.
• I am go7hic (https://keybase.io/go7hic) on keybase.
• I have a public key whose fingerprint is 093F 4C3C 7FF4 7B9C DC4F D095 8C4E DA4D A4B6 F9F7

To claim this, I am signing this object:

Go7hic

var http = require('http');

/**
 * 读取远程文件
 *
 * @param {String} url
 * @param {Function} cb
 *   - {Error} err
 *   - {Buffer} buf
 */

Go7hic

{"sig":"1e4efb648f274ba44f02cf7d426ce93dca01d4e5dc7ff75cc539d0eecadfcca9d0318e3483db5e069ce00aa0b4852340eae43dbd46b58ee630f8b31580c27c380","msghash":"57578cd28d1ce0c9f4f3f01a51bec57c4a2d5a45a24b5c7393739d0d194477f9"}

Go7hic

```
function deepCopy(p, c) {
　　　　var c = c || {};
　　　　for (var i in p) {
　　　　　　if (typeof p[i] === 'object') {
　　　　　　　　c[i] = (p[i].constructor === Array) ? [] : {};
　　　　　　　　deepCopy(p[i], c[i]);
　　　　　　} else {
　　　　　　　　　c[i] = p[i];
　　　　　　}

Go7hic

手机号码：

Go7hic

数据结构

数据结构（英语：data structure）是计算机中存储、组织数据的方式。——维基百科

• 数组(Array)
• 栈(Stack)
• 队列(Queue)
• 链表(Linked List)
• 集合(Set)
• 散列表(Hash) 和 字典(Map)
• 树(Tree)

Go7hic

// 千位数
function commafy(num) {
    
    num = num + '';

    var reg = /(-?\d+)(\d{3})/;

    while(reg.test(num)) {
        num = num.replace(reg, '$1,$2');
    }