AppleScript: Please explain these two commands

[NovaScotian]

Quote: Originally Posted by J Christopher Okay, thanks. That makes sense. Just to make sure I'm understanding correctly, my doWithTimeout(uiScript, timeoutSeconds) is the functional equivalent (in this particular case) to tell application "System Events" to keystroke tab delay 2 Is this correct? Is the "my doWithTimeout()" a single defined function, or is "my" separate from "doWithTimeout()"? If the latter is true, what does "my" do?

Your functional equivalent is correct, and my refers to the script itself, usually meaning that AppleScript, Standard Additions, or a Scripting Addition should do it, not a tell block in which the command is embedded:

tell application "Finder"
	set someThing to my Handler(arguments)
end tell

on Handler(arg)
	-- do stuff the Finder doesn't know about
end Handler