Currently in order to decide if I want to add a value into the stack I have to do a condition to compare before the action to push the value.
That doubles the work, doubles the number of comparisons.
I want to do a comparison in the action, without having to add a value to the stack if the comparison comes up with a value I don't want to add.
Nothing is not an option. ha ha
To be more specific. I want to see if a value exists, before I add it, but theres two different values, x, and y, so two different arrays... as stacks.
Even more specific. The last value in the stack is what need to be compared.