js数组对象深度复制

var deepCopy = function(o) {
if (o instanceof Array) {
var n = [];
for (var i = 0; i < o.length; ++i) {
n[i] = deepCopy(o[i]);
}
return n;

} else if (o instanceof Object) {
var n = {}
for (var i in o) {
n[i] = deepCopy(o[i]);
}
return n;
} else {
return o;
}
}

$.map([{},{},{}], function (obj) {
return $.extend(true, {}, obj);//返回对象的深拷贝
});