#26 Treat the bottom of the stack as implicit ""

[Martin Büttner]

This is an alternative suggestion to ticket 3.

Whenever an operator tries to use more operands than are present on the stack, supply empty arrays for the others. Most use-cases I can think of are source-layout challenges, but you can also consider being able to terminate a g or h loop by emptying the stack, or being able to build a string in a loop with + without having to supply an empty string manually first.

[Martin Büttner]

I have thought about this some more, and I think this could actually be even more powerful: additionally add an operator which allows to switch the element that is returned on the bottom of the stack. The default could be either 0 or "" (something falsy). I'm not entirely sure which of these is more useful - they both have their use cases. But then if I can do something like 5ev, then from then on hitting the bottom of the stack implicitly returns 5.