Temporary custom properties

[Chipp Walters]

Hi Russell,

I typically use local var arrays to do what you're trying to do. You
can also set them if you like from elsewhere. For instance, say you
have a card with a local variable "lFred"

so your card script looks like this:

local lFred

on doThis
  put "hello" into lFred"
end doThis

on doThat
  put lFred into me
  --> PUTS FRED INTO THIS FIELD IF doThis HAS BEEN CALLED
end doThat

So, if you want to set the lFred variable from a button on the card
(treating it like it is a global) then put in the button script:

on mouseUp
  put "jack ran up the hill" into tData
  setFred tData
end mouseUp

and in the card script you add:

on setlFred pData
  do ("put pData into " & pLocalName)
  --> THIS SETS THE LOCAL VAR lFred TO pData
end setLocal

And if you want to retrieve the local, put this in the card script:

function getFred
  return lFred
end getFred

and your script to retrieve the local is now:

on mouseUp
  put getFred() into tData
end mouseUp

This has the advantage of not having to worry about global namespace
collisions, or where you've placed globals all over your stack, and
how to replace them. Also, if you need to edit the "global" bizlogic,
you can do it in one place.

I don't think it's always clear to users how locals can act like globals.

HTH,
Chipp