对象数组
const arr = [
{num:1,name:'张三'},
{num:2,name:'张三'},
{num:3,name:'张三'},
{num:4,name:'张三'},
{num:5,name:'张三'},
{num:6,name:'张三'}
]
// 筛选对象数组中 每一项最大的三个num值 , 形成一个新的对象数组 查找后例子如下
const newArr = [
{num:4,name:'张三'},
{num:5,name:'张三'},
{num:6,name:'张三'}
]