good for/on someone

used for saying that you are happy about something good that someone has done or that has happened to them

当你为某人做了一件对他自己有益的事或有好事发生在他身上而高兴时，就可以说good for you。

例句：

- I've decided to go back to school for some training in programing.

我决定再回学校学习一下编程。

- Good for you.

不错啊!