Possible Duplicate:
What is the most efficient way to clone a JavaScript object?
我有一个这样的对象:
User = {
name: "user",
settings: {
first: "1",
second: "2"
}
}
还有第二个:
user1 = {
name: "user1",
settings: {
second: "3"
}
}
现在我想将 user1 的自定义值复制到用户中，使用:
for(var key in user1){
User[key] = user1[key];
}
结果用户将是:
User = {
name: "user1",
settings: {
second: "3"
}
}
User.settings 已完全替换，而我只想替换 settings.second。
如何在不知道主对象有多少子对象的情况下实现这一点？
我发现最好的方法是:
http://andrewdupont.net/2009/08/28/deep-extending-objects-in-javascript/
Object.deepExtend = function(destination, source) {
for (var property in source) {
if (typeof source[property] === "object" &&
source[property] !== null ) {
destination[property] = destination[property] || {};
arguments.callee(destination[property], source[property]);
} else {
destination[property] = source[property];
}
}
return destination;
};
Object.extend(destination, source);
这个呢？
function clone(destination, source) {
for (var property in source) {
if (typeof source[property] === "object" && source[property] !== null && destination[property]) {
clone(destination[property], source[property]);
} else {
destination[property] = source[property];
}
}
};