Therefore, they are typically used to call Objective-C methods in AppleScriptObjC scripts. Interleaved parameters resemble Objective-C syntax. display dialog theErrorMessage buttons theButtons.on displayError:theErrorMessage withButtons:theButtons.Would you like to continue?" withButtons: tell me to displayError:"There's not enough available space.It also makes future script updates easier, as you can change behavior in one place to affect an entire script. This can be useful when troubleshooting you can narrow in on a single handler to resolve a problem, rather than sorting through a long, complex script. Handlers provide a way to organize your code by breaking it up into smaller, manageable, modular chunks. Handlers can optionally be written to receive information as input for processing ( parameters), and can return information as output ( result or return value). Each time you do, any code in the handler runs. You then call, or evoke, a handler whenever necessary by referring to it by name. You can name a handler whatever you like as long as the name contains no special characters, such as punctuation, or spaces, and isn’t a reserved language term. Instead of inserting the same code over and over, you write it once and give it a name. Handlers are generally written to perform a task multiple times throughout a script, such as displaying an alert, writing text to a file, or creating an email message. Throughout this document, these terms are used interchangeably. Collections of script statements that can be invoked by name are referred to as handlers in AppleScript, functions or methods in JavaScript, and subroutines in some other languages.
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