javascript基础--数组增删改
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Document</title> <script> var arr = [1, 2, 3, 4, 5, 6, 7, 8]; //1中间删除 // arr.splice(2, 3); // alert(arr); //2 中间插入 // arr.splice(2, 0, 'a', 'v', 'c'); // alert(arr); //3修改 arr.splice(2, 2, 'a', 'b'); alert(arr); </script> </head> <body> </body> </html>