I've been meaning to learn AHK properly and rewrite my large kludgy script for ages. So I just started delving into the docs with that aim in mind, and one of the first things I came across was the console and Lines most recently executed. How exciting I thought. Oh look, you can refresh the view. Oh dear, why is that hotkey definition running constantly. Wow, every few ms, that's a problem!
That piece of code was the only place I'd used expression syntax, so I've misunderstood something there. Sorting out my ignorance of legacy and new syntax was the main thing I wanted to learn, so this is fortuitous. Go and read the docs. Notice the v1/v2 toggle in the page header. What version have I got? Right, better Google v2 then. Decide I should switch. Read the forums. Decide I shouldn't switch. Back to the docs. #IfWinActive, #If <expr>... why did I use one rather than the other when I wrote this bit years ago? Make some test files. Why does the console show the code running constantly here but not there? Or when I define these couple of hotkeys but not those? Time passes... Change the hotkey to a different key. All is well! Change it back
Copy the line 10 times to define hotkeys for all the function keys. No good. Comment them out one by one. No good... Until I comment out F5. What the...? Why F5? Why that ... oh.*facepalm*