OK, but I was thinking along the lines of how easy it is in (for example) Julia to make methods that dispatch on types, so that your function could examine the

OK, but I was thinking along the lines of how easy it is in (for example) Julia to make methods that dispatch on types, so that your function could examine the arguments, and if one of them happens to be a single character, and the other a string or array, do the sensible thing, regardless of the order in which you typed in the arguments.