jQuery 真伪数组的转换

//真数组转换伪数组
var arr = [1,3,5,7,9];
var obj = {};

[].push.apply(obj,arr);
console.log(obj)



//伪数组转真数组
var obj2 = {0:"张三",1:"李四",length:2};
var arr = [];

[].push.apply(arr,obj2);
console.log(arr);