<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Document</title> <script> function Person(name,age){ this.name =name this.age = age } const per = new Person('孙悟空',25) const per1 = new Person('蜘蛛金',15) const per2 = new Person('猪八戒',24) const per3 = new Person('二郎神',8) const per4 = new Person('红孩儿',10) const per5 = new Person('杨戬',38) const arry = [per,per1,per2,per3,per4,per5] const newArry = [] for(let i=0;i<arry.length;i++){ if (arry[i].age>20){ newArry.push(arry[i]) } } // console.log(newArry); // forEach函数 // 这种由我们创建的函数，但是不是由我们调用的函数叫做回调函数。 arry.forEach(function(item){ console.log('hello',item); }) </script> </head> <body> </body> </html>