How To Do OpenSCAD Stack-Like Operations? -

I'm very new to OpenCAD, but it's got the most down below. However, I'm not sure how I can perform a stack-like operation. It really does not matter how the data structure is used, as long as I can push and pop the numbers is it possible?

I worked extensively with the pile while applying.

The size of the trick is to use the nested correct associative lists of 2 = eg if you want to push in some stacks:

  function push (stack, item) = "Foo", ["Bar", []]].  [item, stack];  

If you want to pop the stack:

  function pop (stack) = stack [1];  

And if you want to undo the value that was popped up:

  function peak = stack [0];  

You can also apply a map / under work using recursion:

  function map (stack) = push (map (pop (stack) ), F (peek (stack))); Reduce function (stack) = f (peak (stack))? Push (stack), f (peak (stack)): reduce (pop (stack));  

Of course, this version is now 2015.03, you can list Think of the use of understanding, suppose what you really want.