es6 记录

  const map = [1, 2, 3];
    let mapnew = map.map(m => m + 1);


    let people = name => 'hello' + name;


    let peopleNew = (name, age) => {
        const fullName = 'hello' + name
        return fullName
    } 


    const peopletwo = {
        name: 'lux',
        getName() {
            console.log(this.name)
        }
    }


    const objA = { name: 'cc', age: 18 }
    const objB = { address: 'beijing' }
    const objC = {} // 这个为目标对象
    const obj = Object.assign(objC, objA, objB)


    // 我们将 objA objB objC obj 分别输出看看
    console.log(objA)   // { name: 'cc', age: 18 }
    console.log(objB) // { address: 'beijing' }
    console.log(objC) // { name: 'cc', age: 18, address: 'beijing' }
    console.log(obj) // { name: 'cc', age: 18, address: 'beijing' }




    // 是的，目标对象ObjC的值被改变了。
    // so，如果objC也是你的一个源对象的话。请在objC前面填在一个目标对象{}
    Object.assign({}, objC, objA, objB);






    //对象
    const people = {
        name: 'lux',
        age: 20
    }
    const { name, age } = people
    console.log(`${name} --- ${age}`)
    //数组
    const color = ['red', 'blue']
    const [first, second] = color
    console.log(first) //'red'
    console.log(second) //'blue'




    //数组
    const color = ['red', 'yellow']
    const colorful = [...color, 'green', 'pink']
    console.log(colorful) //[red, yellow, green, pink]


    //对象
    const alp = { fist: 'a', second: 'b' }
    const alphabets = { ...alp, third: 'c' }
    console.log(alphabets) //{ "fist": "a", "second": "b", "third": "c"


    var s = 'Hello world!';


    s.startsWith('world', 6) // true
    s.endsWith('Hello', 5) // true
    s.includes('Hello', 6) // false