Question

What is the best way to detect recursive method calls? Perhaps, it can be made into this format:

def foo
  if some_code_to_detect_recursive_call
    ...
  else
    ...
  end
end

I can think of a way parsing the caller information, but I am interested in seeing if there are better ways.

Answer 1

Just increment a counter (an instance or global variable) after entry to your method and decrement it on exit.

At entry, the counter tells you your recursion level.