This is the last step between modeling our problems and coding our solutions. Each of the elements in our requirements model helps provide us with necessary information that can be used to solve our problem. While the book has the models and design being two separate steps, in many cases you will find that they…
The article tag should have independent, self-contained content. This means it should stand on its own, without the need for information from any other section of the web page. However, it can be related to articles. The difference between it, and the main tag, is that you can have multiple article tags on a web…
The main tag is used to define the main content section of the web page. The content within the web document should be unique between the pages, and not contain replicated data such as navigation links, headers, footers, sidebar data etc. Within the main tag, you can find articles, standard content which you’ve already seen,…
As you start to build more complex websites, it is important to organize the data structure efficiently and effectively. HTML 5 added several organizational tags to help provide context to the contained data. In the previous version of HTML, we’d usually use a div tag, with a user created class. However, the issue with that…
Software patterns are a mechanism for capturing domain knowledge in a way that allows it to be reapplied when a new problem is encountered. In some cases, that knowledge is applied to a new problem within the same domain. In other cases, the domain knowledge captured by a pattern can be applied by analogy to…
The state of the class takes on both active and passive qualities. A passive state is simply the current status of an objects attributes. For example: Consider a GPS app. Your position, direction, etc are just attributes of your class, and thus the passive state. An active state is the status of an object that…
In chapter ten, we looked at data and how to identify classes that were needed from Use Cases. In Chapter 11, we look at Information Exchange through Events. An Event is not the data that has been changed, but rather that information has been exchanged between elements. An Event occurs when information that is exchanged:…
Data transformation is often simple like splitting a full name into the first and last, or vice versa. However, sometimes it is more complicated, much more complicated. I once wrote a data converter which had to convert data stored in a file with the size of data store being a certain number of bytes into…
