TAILIEUCHUNG - HandBooks Professional Java-C-Scrip-SQL part 153

Tham khảo tài liệu 'handbooks professional java-c-scrip-sql part 153', công nghệ thông tin, kỹ thuật lập trình phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | case of the big pointer array itself. The problem is that a big pointer array can have a variable number of elements in it so it would be all too easy for us to accidentally step off the end of the big pointer array with potentially disastrous results. To prevent such a possibility I have created the data type called AccessVector. The purpose of this data type is to combine the safety features of a normal SVector with the ability to specify the address where the data for the SVector should start rather than relying on the run-time memory allocation library to assign the address. Because this data type is designed to refer to an existing area of memory the copy constructor is defaulted as is the assignment operator and the destructor and there is no SetSize function such as exists for regular SVectors. This data type allows us to map a predefined structure onto an existing set of data which is exactly what we need to access a big pointer array safely. As this suggests the big array header is an AccessVector variable which we can use just as though it were a normal The LittlePointerBlock class The interface for LittlePointerBlock is shown in Figure . The interface for the LittlePointerBlock class from quantum Figure codelist There s nothing in this class that isn t exactly analogous to the corresponding functions in the big pointer array class. Therefore I won t waste either your time or mine by repeating the analysis of the big pointer array class here. Instead let s move along to another class that is somewhat more interesting if only because it seems to have no purpose for existing. The LeafBlock class The interface for LeafBlock is shown in Figure . The interface for the LeafBlock class from quantum Figure codelist This is a real oddity a class that defines no new member functions or member variables. Of what value could such a class possibly be The answer is that it provides a

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