Represent the problem programatically. If there's some reason data is missing, use a symbol :idk, :not-provided, etc. Programs DO things, use what you're doing

Represent the problem programatically. If there's some reason data is missing, use a symbol :idk, :not-provided, etc. Programs DO things, use what you're doing to describe your program, whenever possible. In a better world, max([]) # -> None(T) But sometimes we have to get creative...