笔记：
对象结构能够帮助我们更为简便的提取对象中的属性，对其重命名，以及赋予默认值。
({name,age} = Tom); 小括号包裹起来。

<script type="text/javascript">
        const Tom = {
            name:'Tom Jones',
            age:25,
            family:{
                mother:'Norah Jones',
                father:'Richard Jones',
                brother:'Howard Jones'
            },
        }

        let name ='';
        ({name,age} = Tom);

        console.log(name);
        console.log(age);
    </script>

嵌套，重命名

<script type="text/javascript">
        const Tom = {
            name:'Tom Jones',
            age:25,
            family:{
                mother:'Norah Jones',
                father:'Richard Jones',
                brother:'Howard Jones'
            },
        }

        const father = 'Dad';
        const{father:f,mother:m,brother:b} =Tom.family;

        console.log(f);
        console.log(m);
        console.log(b);
    </script>

未定义的属性初始值为undefined的时候才会使用默认值

<script type="text/javascript">
        const Tom = {
            name:'Tom Jones',
            age:25,
            family:{
                mother:'Norah Jones',
                father:'Richard Jones',
                brother:'Howard Jones',
                sister:undefined
            },
        }

        const father = 'Dad';
        const{father:f,mother:m,brother:b,sister='have no sister'} =Tom.family;

        console.log(sister);
    </script>

一个个属性值注释掉看看初始值

<div class="container"></div>
    <script type="text/javascript">
        function appendChildDiv(options ={}){
            const {parent = 'body',width = '100px',height = '80px',
            backgroundColor = 'pink'} =options;
            const div = document.createElement('div');
            div.style.width = width;
            div.style.height = height;
            div.style.backgroundColor = backgroundColor;

            document.querySelector(parent).appendChild(div);
        }

        appendChildDiv({
            parent:'.container',
            width:'200px',
            // height:'150px',
            // backgroundColor:'yellow'
        })

    </script>

笔记：
逗号分隔属性名

<script type="text/javascript">
        const numbers = ['one','tow','three','four'];
        const [one,,three] = numbers;
        console.log(one,three);
    </script>

…others 剩余元素组成新数组，…others只能放在数组最后

<script type="text/javascript">
        const numbers = ['one','tow','three','four'];
        const [one,...others] = numbers;
        console.log(one,others);
    </script>

数组中定义默认参数

<script type="text/javascript">
        const numbers = ['one','tow','three','four'];
        const [one,two,three,four,five='PHP'] = numbers;
        console.log(one,two,three,four,five);
    </script>

交换变量值

<script type="text/javascript">
        let a = 10;
        let b = 15;
        [a,b] =[b,a];
        console.log(a,b)
    </script>

笔记：
最初的for循环，比较繁琐

<script type="text/javascript">
        const fruits = ['Apple','Banana','Orange','Mango'];

        for(let i=0;i<fruits.length;i++){
            console.log(fruits[i]);
        }
    </script>

forEach循环，不能终止或者跳过

<script type="text/javascript">
        const fruits = ['Apple','Banana','Orange','Mango'];

        fruits.forEach(fruit =>{
            // if(fruit ==='Orange'){
            //     break;
            // }
            console.log(fruit);
        })
    </script>

For in 遍历的是可枚举属性

<script type="text/javascript">
        Array.prototype.first = function(){
            return this[0];
        }
        const fruits = ['Apple','Banana','Orange','Mango'];
        fruits.describe = 'My favorite fruits';

        for(let index in fruits){
            console.log(fruits[index]);
        }
    </script>

最好的方法 for of，解决了以上方法的缺陷

<script type="text/javascript">
        Array.prototype.first = function(){
            return this[0];
        }
        const fruits = ['Apple','Banana','Orange','Mango'];
        fruits.describe = 'My favorite fruits';

        for(let fruit of fruits){
            if(fruit ==='Orange'){
                continue;
            }
            console.log(fruit);
        }
    </script>

笔记：
For of循环可以用于数组、字符串、map、NodeList等，目前还不支持对象。
.entries() 取到索引和值
console.log(fruit[1]); 当前元素的值

<script type="text/javascript">
        const fruits = ['Apple','Banana','Orange','Mango'];
        for(let fruit of fruits.entries()){
            console.log(fruit);
        }
    </script>

用结构的语法[index,fruit]

<script type="text/javascript">
        const fruits = ['Apple','Banana','Orange','Mango'];
        for(let [index,fruit] of fruits.entries()){
            console.log(`${fruit} ranks ${index +1} in my favorite fruits`);
        }
    </script>

用于数组，求和

<script type="text/javascript">
        function sum(){
            let total =0;
            for(let num of arguments){
                total= total +num;
            }
            console.log(total);
            return total;
        }
        sum(10,20,300,434,12,33);
    </script>

用于字符串循环

<script type="text/javascript">
        let name ='Veg.kim';
        for(let char of name){
            console.log(char);
        }
    </script>

用于li标签循环，click切换样式

<head>
    <title>Var-Let-Const</title>
    <style type="text/css">
    .highlight{
        padding:2px 5px;
        background: #00adb5;
        color:white;
    }
    </style>
</head>
<body>
    <ul>
        <li>Go to Store</li>
        <li>Watch TV</li>
        <li>Go shopping</li>
    </ul>
    <script type="text/javascript">
        const lis = document.querySelectorAll('li');
        for(let li of lis){
            li.addEventListener('click',function(){
                this.classList.toggle('highlight');
            })
        }
    </script>
</body>

这个做ppt的不错https://ppt.baomitu.com

从别的网站上复制带图片的内容到UEditor里，粘贴的同时图片存储到自己的服务器上怎么做啊？

laravel项目默认在vendor/bin/phpunit

全局安装

➜ wget https://phar.phpunit.de/phpunit.phar
➜ chmod +x phpunit.phar
➜ sudo mv phpunit.phar /usr/local/bin/phpunit
➜ phpunit --version

PHPUnit 6.3.0 by Sebastian Bergmann and contributors.

Keymap搜索run context快捷键设置成control+shift+R

笔记：
Command + shift + a 输入file template
添加Eloquent Model

#if (${NAMESPACE})
namespace ${NAMESPACE};
#end
use Illuminate\Database\Eloquent\Model;

class ${NAME} extends Model {
    protected \$fillable = [];
}

command+shift+a 搜索配置关键词

breadcrumbs \\编辑区样式
code folding \\编辑区折叠线
show right margin \\编辑区右侧边线
typo \\编辑区内容部分波浪线

command+P 快速查找文件快捷键
control + command +M 查看类中有哪些方法的快捷键
command+E 查看最近打开的文件
option +command +O 设置symbols快捷键，查找任意方法

chmod -R 777 /usr/local