4.数组

由admin

11月 28, 2021 code

代码

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<script>
    var arr=[];
    console.log(typeof (arr));
    var arr1=[1,2,3,4,5];
    console.log(arr1);
    console.log("arr1的元素个数是："+arr1.length);
    arr1.length=0;
    console.log(arr1);
    var arr2=["lin1","lin2","lin3","lin4"];
    console.log(arr2[0]);
    for(var i=0;i<arr2.length;i++){
        console.log(arr2[i]);
    }
    arr2[0]="linzi1";
    console.log(arr2[0]);
    arr2[4]="lin5";
    console.log(arr2);
    console.log(arr2.pop());
    console.log(arr2);
    arr2.push("linzi4");
    console.log(arr2);
    arr2.splice(0,2,'xiaolinzi');
    console.log(arr2);
</script>
</body>
</html>