We’ve talked about Constructors in C++ already. One of the special methods, along with Destructors, that C++ offers. There is a third, special method which C++ offers. That is called a Copy Constructor. The Copy Constructor is a special type of constructor, which is intended for use when you duplicate an object. Some people will…
We’ve looked at Constructors in C++ to create an object, and building an object with new. However, what happens when we no longer need that object? That’s where a destructor is called. It is built into all objects, and if you don’t define one, a default one will be called for you. The destructor’s job…
this, is a special keyword and pointer. It points to the very object is it in… you may think of it as self-referencing to it’s own object. This is important in case a class method has a parameter name with the same name as a class property. If the keyword this is not used, then…
While you can create pointers with ordinary primitive objects, that’s not where the real power of pointers lie. The power is to reference objects that we create, so they don’t take up too much space in lower memory locations, and we can work on passing them around. To create an object dynamically on the heap,…
A C++ program may return a pointer, just is may have them passed to the function. To specify a pointer, you define that data type in the return type. For example: The book gives an example on how to return an array this way, however, as it uses an existing array, the array is already…
XML was designed to be a be-all end-all data format. However there have been issues that have arisen from its use. Strict Implementations I’ve seen more than once where companies requesting data be sent via XML were really just text parsing a file. They’d require nodes that were not being used, and not having the…
XML has many benefits going for it as a format to move data between applications and/or servers. Some of the benefits include: XQuery, which is a tool for searching for nodes with XML. We’ve previously looked at searching XML with XQuery. While different libraries may use different implementations, they generally have something that can be…
When we look at transferring data we have to know how we want to format that data to transfer. A common, simple, file allows for it to easily be written from one system and read by another. But we didn’t always have a simple format that could be used for this purpose. We’d like to…
