CHAPTER 5 Storing and Retrieving (Web hosting isp)
CHAPTER 5 Storing and Retrieving Application Data As you develop more and more complex REALbasic applications, you will find yourself needing to collect, store, and process data during program execution. This chapter shows you a number of different ways that REALbasic enables you to store and manipulate application data. This includes learning how to work with variables, arrays, dictionaries, and constants. You also learn how to enhance your applications using a number of different techniques for embedding comments. Specifically, you learn how to Store and retrieve data in variables and arrays Work with different data types and convert data between them Set variable scope Adding Comments to Your Code Up to this point in the book, the sample applications you developed were relatively small and straightforward. However, as your applications grow, they will become more complex and more difficult to understand. One way to cope with this is by embedding comments and notes in your applications. This will be greatly appreciated by those who come along behind you to provide support and to modify your program code. REALbasic provides you with a number of different ways of embedding documentation within your applications, including comments, notes, and property comments. Comments Comments are text statements embedded within your applications that document your programming statements and logic. While visible to the programmer, comments are not compiled into REALbasic applications and have no impact on application performance. REALbasic provides you with a number of different ways to add comments to your applications, including single quotes (’), forward slashes (//), and the REM keyword.
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