How to determine if a function has been called in Powershell

Question

I have a Big Script where i want to ignore a function call if it has been called already.

Am having a flag which is set to determine this now. But how do i do this without needing to have a flag or count for this.

Thanks!

Answer 1

You can make the function re-write itself, essentially becoming a noop after the first invocation:

function TestFunction
 {
   'Do Stuff'
   function Script:TestFunction { Return }
 }