var date = {
a:[1,2],
b:["a","c",{
f:"cc",
d:"dd"
}]
a:[1,2],
b:["a","c",{
f:"cc",
d:"dd"
}]
}
/*
*date 传入对象
* deep 是否深度拷贝 是为ture 不是可以不填
*/
var extend = function(date,deep){
var o = date instanceof Array ? []:{}
// Array.isArray(date) date instanceof Array date.length && date.join && date.constructor === Array 判断是不是数组 (判断数组的几种方式)
for(var key in date){
var val = date[key]
o[key] = (deep&&typeof val ==="object")?extend(val,deep):val
}
return o
}
var o1 = extend(date,true)
console.log(date)