SOURCE

    /*var str = 'ashgdasgfawfgh'
    console.log(str);
    console.log(str.charAt(5));
    console.log(str.includes('sh'));
    //正则表达式
    console.log(str.replace(/f/g,'F'));


    var str2 = '1,2,3,4,5'
    console.log(str2.split('2,3'));*/
    
    var arr1 = [1,2,3,4,5]
    arr1.push(6)
    console.log(arr1);
    console.log(arr1.reverse());
    
    //排序实需要指示函数的

    arr1.sort(function(a,b){
        return b-a
    })
    console.log(arr1);


    var pyq = [
        {name:"n1",age:18},
        {name:"n2",age:14},
        {name:"n3",age:16},
    ]
    pyq.sort(function(a,b){
        return a.age-b.age
    })
    console.log(pyq);


    //所有元素连接成一个字符串
    var str = arr1.join()
    console.log(str);

    //forEach
    arr1.forEach(function(item,index){
        console.log(item);
    })