Attributes help describe a class. They are what help us differentiate from one object and another. Attributes should be relevant to the system that you are building. So two similar objects might have very different attributes based upon how it is used. Consider a College Student Athlete. The data needed for your sports team is…
Some things are easy to identify as a class. For example, if you look around the room, you can find lots of physical objects which can be made into classes. However, in a software environment, this may not always be as easy to identify. So look at the following questions to start to identify what…
Variables must be declared before they can be used in C++. This is why a lot of developers follow the best practice of defining the variables at the top of a function. Variable Scope By default variables can be used in the function that they are created. This is their scope, is is often referred…
Calling a function has a performance penalty because you have to create variables, specify scope, pause the current variables and push data onto the call stack, just to name a few reasons. C++ allows you to define an inline function, which should be short, to improve the performance. In doing so, the compiler will actually…
The next thing one should know about when working with the size of an element is margins, padding, and width. Margins Margins are simply the space between two elements. We can specify the margin to be the same all the way around an element, the same on the left and right and a different value…
In order to bring in the space between the edge of one element (the browser for example) and another, we have to understand sizing. All sizing is done through a series of unit measurements. Depending upon what you are creating will depend upon what unit you are wanting to choose. Some units are based upon…
There are two basic places you can define styles. There are legitimate reasons for both of them, and they should be used accordingly. In both cases, styles defined first may be overwritten with subsequent style definitions. It will only overwrite a value given to a property, not the whole style. So if you have a…
The process of Extract, Transform, and Load (ETL) is the process of taking data from one or more sources, and sending it to a different destination. During the process the data will be converted to fit the new destination locations. While ETL doesn’t get the attention of many other algorithms, it is a very important…
