How to use subroutines/functions in Applescript workflows?

[alfo3311]

Hi,

 

Can I use subroutines in NSAppleScript Alfred workflows? I can't get this code to work:

on alfred_script(q)

tell application "Google Chrome"
	repeat with t in tabs of windows
		tell t
			if URL starts with "http://www.youtube.com/watch" or URL starts with "https://www.youtube.com/watch" then

				set new_URL to URL			
				set new_URL to replace_chars(URL, "youtube", "yourepeat")
				do shell script "/usr/bin/open -a '/Applications/Google Chrome.app' " & new_URL
			
			end if
		end tell
	end repeat
end tell

end alfred_script


to replace_chars(this_text, search_string, replacement_string)
	set AppleScript's text item delimiters to the search_string
	set the item_list to every text item of this_text
	set AppleScript's text item delimiters to the replacement_string
	set this_text to the item_list as string
	set AppleScript's text item delimiters to ""
	return this_text
end replace_chars

Trying to debug the issue, I pasted the code in Automator (and made a few changes of course), and here's the syntax error I get:

Google Chrome got an error: item 1 of every tab of every window doesn’t understand the “replace_chars” message.

I tried putting the 'to replace_chars' subroutine in other places in the code, but it doesn't work.

 

Any help would be grealtly appreciated it.

[alfo3311]

I found the solution. I needed to write 'my' in front of replace_chars when I call the handler.