REALbasic supports single dimensional and multidimensional arrays. Also, note, the word “Array” was added to the end of the array name to identify it as an array. Note, in this example, a three-letter prefix was added to the beginning of the array name to identify the type of data stored. For example, an array whose purpose is to hold user names might be named strNamesArray. ■ Tip When creating an array name, try to find a name that describes the array’s purpose or contents. Once loaded, you can reference any piece of data in the array by specifying its index number. As each additional piece of data is added to an array, it is assigned an incremental index number. The first element in an array is assigned an index number of zero. Individual pieces of data stored in an array are referred to as elements. In these cases, you can simplify things by storing data in an array.Īn array is an indexed collection of data that can be processed as a unit. For example, an application might need to collect customer names or IDs. In many cases, data managed by your applications may be closely related. The more variables your REALbasic applications have to manage, the more complicated your code becomes. Visual Basic programmers should note that, in REALbasic, the + character is used instead of the & character to perform concatenation. ■ Note When used with two strings, the + character adds together or concatenates the strings to create a new string. The last statement uses the Trim function to remove any leading and trailing blank spaces from the value stored in strSamplemsg before appending the variable’s value to another string. The third statement uses the Uppercase function to convert the value stored in strSampleMsg to all uppercase characters before displaying the resulting string in a pop-up dialog. The second statement uses the Replace function to replace the first occurrence of the string “galaxy” with the string “universe,” found in strSampleMsg before displaying the resulting value of the string in a pop-up dialog. The first statement declares a variable name strSampleMsg and assigns it a text string. ■ Note In the section “Supplying Application Code,” where you’ll supply the program code required to create the RBCalculator application, you have the opportunity to use both the Mid and InStr functions. MsgBox(Trim(strSampleMsg) + ' where no one boldly dared go before!')

The following statement demonstrates how to work with string manipulation functions. C H A P T E R 5 ■ S T O R I N G A N D R E T R I E V I N G A P P L I C A T I O N D A T A

Xojo instr