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…
We’ve seen the benefits of passing variables by reference to a function. It allows you to change their value inside the function. Well, when we pass by reference, this is essentially using pointers – you just didn’t realize it. Therefore you can have instances like: Alternatively I can write it with passing the memory address…
No system, file format, data format, programming language, etc is perfect. However, instead of glossing over the information, it’s better to education oneself as to their shortcomings to ensure that you can work around the limitations. It is worth noting that while JSON is built as a subset of JavaScript it does not include support…
JSON comes with a lot of benefits, which is the reason why many web services provide data either in both XML and JSON, or just JSON. Some of the benefits include: Easy to parse the data. Low overhead (for transmitting the data between client and server) Built in web browser support. Modern JavaScript has it…
