We can replace the direct command handler with a function that reads from an arbitrary address that we give it:
相比之下有些系统可是会直接影响我收入的，而且它们本身并不昂贵。我真的要为了吃饭自己去种粮食吗？采用农业隐喻的话去餐厅吃饭其实要便宜得多。如果我只是想要一个汉堡，肯定没必要自己去买一头牛然后喂养等待，由于比较优势和规模经济的作用在餐厅消费大量的食物实际上成本更低。
。新收录的资料对此有专业解读
Forgetting releaseLock() permanently breaks the stream. The locked property tells you that a stream is locked, but not why, by whom, or whether the lock is even still usable. Piping internally acquires locks, making streams unusable during pipe operations in ways that aren't obvious.
这一理念甚至完美对应着林俊旸告别前一天，马云在云谷学校所说的：
Not the day you're after? Here's the solution to yesterday's Connections.