By Stephen G. Kochan
What's this booklet approximately? aimed toward programmers with out earlier improvement wisdom, starting AppleScript serves as a finished consultant to utilizing AppleScript at the Mac OS X platform. This identify introduces the reader to AppleScript, after which illustrates the best way to successfully commence writing scripts via pattern courses as each one inspiration is brought. routines on the finish of every bankruptcy let the reader to check and reveal their wisdom on tips to write sensible scripts. The appendices comprise an inventory of alternative assets for extra developer info, and a precis of the language appropriate for reference.
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Clicking that button initiates the following actions: ❑ Analyzes your AppleScript code to make sure it conforms to the rules for writing commands and expressions. ) The result of this compilation process is the translation of your AppleScript program into another format that is more optimal for execution ❑ Indents your AppleScript code according to certain stylistic rules ❑ Changes the color of your words, operators, and expressions according to certain rules ❑ Runs your program and displays the result in the lower portion of your window, provided no errors are detected during the compilation phase.
In addition to its use for multiline comments, the paren-star comment is often used to “comment-out” a section of your program that is not yet finished or for debugging purposes. Figure 1-18 shows how the previous program example appears in Script Editor after adding a comment and compiling it. Notice that Script Editor italicizes both types of comments. 22 Writing Your First AppleScript Program Figure 1-18 Summar y In this chapter, you learned how to do the following: ❑ Start up Script Editor ❑ Type a simple AppleScript program, compile it, and run it ❑ Look at the results of the program in the Result pane ❑ Save your AppleScript program to a file ❑ Add a description to your program ❑ Use the display dialog command to display a message to the user ❑ Define a character string ❑ Set up a simple list ❑ Use optional command parameters; in particular, use some of the display dialog command’s parameters to change the labels on buttons, specify a default button, and display an icon ❑ Write an AppleScript program containing more than one command ❑ Add comments to your program 23 Chapter 1 In the next chapter, you learn more about writing expressions, the different types of data that AppleScript supports, and how to work with variables in your programs.
It also illustrates the addition operator, which you can use to add two numbers. Try It Out More on Working with Variables The following steps enable you to continue your practice with variables. 1. Type the following program into Script Editor: -- More on working with variables set a to 100 set b to 200 set sum to a + b sum 27 Chapter 2 2. Click the Result tab and run the program. The following output should be displayed in the Result pane: 300 How It Works The following two statements set the values of the variables a and b to 100 and 200, respectively: set a to 100 set b to 200 Next, the program adds the values stored inside these two variables, assigning the result to the variable sum.