javascript 根据数组指定字段值，实现升序/降序

升序
根据数组num值，实现升序

let data = [{name:"香蕉",num:1},{name:"苹果",num:4},{name:"葡萄",num:3},{name:"草莓",num:2},{name:"芒果",num:5}]
data.sort(function(a,b){
    return a.num - b.num
});
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运行结果

降序
根据数组num值，实现降序

let data = [{name:"香蕉",num:1},{name:"苹果",num:4},{name:"葡萄",num:3},{name:"草莓",num:2},{name:"芒果",num:5}]
data.sort(function(a,b){
   	return b.num - a.num
});
1
2
3
4

运行结果