Suppose I have a stack file with some reusable
functions and constants in it - e.g. for doing math

How do I store the constants in my reusable stack and
then make them available to the rest of the app when I
load the stack?

If I have some functions, how do I do the same kind of
thing with them?

I am still not clear on the use of 'insert script' or
custom properties. If somebody could show me how this
works with the following constant and function, I
would be very grateful

e.g. my library stack contains ...

a constant called 'HalfCircle' with a value of 180.0

a function called 'degreestoradians' defined as

function degreestoradians degrees
   return (degrees/180.0) * 3.1415926
end function

How do I store these in my library stack?
How do make them available to the rest of my app when
the library stack is loaded?

You can't store re-usable constants :-(
Constants have to be declared in every script that uses them.
The easiest way to to make them functions rather than constants.

Make your stack with the stack script containing all your math functions e.g.
function halfCircle
return 180
end halfCircle


function degreestoradians degrees
   return (degrees/180.0) * 3.1415926
end function

When you need to access these functions in another stack file, go to the Inspector for that client stack and set the "Stack files" to include your Math stack. This will make sure that the file containing your Math stack is included in any build. In the startup routines i.e. preOpenStack or openStack, include a line saying:
start using stack "Math"


Now you can call your halfCircle or degreestoradians functions from anywhere in the client stack or it's sub-stacks.

There are other ways to achieve the same result, but this is the one I use most of the time.

Cheers,
Sarah

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