Adobe 23101335 Scripting Guide - Page 17
Commands and methods, 2.7.1 Conditional statements
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Scripting basics 2 Commands and methods 2.7 Commands and methods Commands (AppleScript) or methods (Visual Basic and JavaScript) are what makes things happen in a script. The type of the object you're working with determines how you manipulate it. AS In AppleScript, use the make command to create new objects, the set command to assign object references to variables and to change object properties, and the get command to retrieve objects and their properties. VB In Visual Basic, use the Add method to create new objects, the Set statement to assign object references to Visual Basic variables or properties and the assignment operator (=) to retrieve and change object properties. JS In JavaScript, use the add() method to create new objects, and the assignment operator (=) to assign both object references and variables 2.7.1 Conditional statements Conditional statements make decisions - they give your scripts a way to evaluate something like the blend mode of a layer or the name or date of a history state - and then act according to the result. Most conditional statements start with the word if in all three scripting systems. The following examples check the number of currently open documents. If no documents are open, the scripts display a messages in a dialog box. AS tell application "Adobe Photoshop 7.0" set documentCount to count every document if documentCount = 0 then display dialog "No Photoshop documents are open!" end if end tell Photoshop 7.0 Scripting Guide 17