判断是否为数组方法
var arr = []var obj = {}console.log(arr instanceof Array);console.log(obj instanceof Array);console.log(Array.isArray(arr));console.log(Array.isArray(obj));
var arr = []var obj = {}console.log(arr instanceof Array);console.log(obj instanceof Array);console.log(Array.isArray(arr));console.log(Array.isArray(obj));
