[摘要] problem：Given an absolute path for a file (Unix-style), simplify it.For example,path="/home/", =>"/home"path="/a/./b/../../c/", =>"/c"click to show co[全文]
[摘要] 《Head First Design Pattern》一書中對觀察者模式的定義如下： The Observer Pattern defines a one-to-many dependency objects so that when one object changes state, all of[全文]
