22 fifter数组遍历

<script>
        var  arr = [3,4,5,6];
        // filter  只要达到某个条件  就会返回一个新的数组
        var res = arr.filter(item=>{
            return item>4;
        })
        console.log(res)
         var students = [
             {name:"李四",age:"18岁"},
             {name:"李二",age:"11岁"},
             {name:"李五",age:"19岁"},
             {name:"王四",age:"22.4岁"}
         ]
        //  大于11岁  返回新的数组
        var newStudents = students.filter(item=>{
            return parseFloat(item.age)>11;
        })
        console.log(newStudents)
    </script>