官方描述Once is an object that will perform exactly one action, 即Once是一个对象,它提供了保证某个动作只被执行一次功能，...
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Refactoring
Martin Fowler、Kent Beck、John Brant、William Opdyke、Don Roberts / Addison-Wesley Professional / 1999-7-8 / USD 64.99
Refactoring is about improving the design of existing code. It is the process of changing a software system in such a way that it does not alter the external behavior of the code, yet improves its int......一起来看看 《Refactoring》 这本书的介绍吧!
