程序员修炼之道读书笔记 30 Finish What you Start

分配资源的函数或对象，同时应该负责释放资源。不要推迟到另外一个函数或对象去释放。这样容易造成潜在隐患。 比如在一个函数中open file 或者new 空间，也应该在该函数中close  file 或 delete 空间。

whoever allocates a resource should be responsible for deallocating it。

Some C and C++ developers make a point of setting a pointer to NULL after they deallocate the memory it references. This is a good idea.

Because this will prevent refer(deference) to this pointer later, which will cause runtime error.