“The key is to acknowledge from the start that you have no idea how this will grow. When you accept that you don’t know everything, you begin to design the system defensively. You identify the key areas that may change, which often is very easy when you put a little bit of time into it. For instance, you should expect that any part of the app that communicates with another system will likely change, so you need to abstract that away.” ——一切皆可变，所以要抽象。

开博了，等你来

“只有初恋般的热情和宗教般的意志，人才可能成就某种事业。” ——路遥