Wish: Switch/Case node

[andydandy74]

Instead of nesting several IF nodes, it would be great to have an expandable switch/case node that could accomodate a arbitrary number of cases. The interface might work like the List node where we can add and remove items by clicking on +/-.

[Steell]

We will need to put some thought into how the UX for a switch/case node would work. Ideally, it would work something like Scheme's cond expression documented here. To add more cases to the cond, we would use the +/- buttons as seen in other expandable nodes, but it would have to add/remove two inputs at a time, since we need a test and a result for each case.

[andydandy74]

Maybe this could actually be done by using two nodes: a switch node (with an expandable number of case inputs and a result output) and a case node (with a test and result input and a case output)? Plus, I think there would have to be a default result or else input in the switch node that catches everything that's not defined in the individual cases.

[andydandy74]

In the meantime, I have built a custom node which I've just uploaded to the package manager. I still think this would make sense as a built-in node (and would probably be faster, too), so I'd like to keep this issue open. For the custom node I'm just passing two separate lists for the cases and their respective values: