How to signal "not implemented yet"?

Question

In the initial drafting of a new gem I need to leave some method implementations empty ( to be implemented in the next )

Therefore, I would like to signal a "not implemented yet" exception

I'm wondering if there is a best practice or standard conventions specific to the Ruby language to code this kind of placeholder / exception.

i.e: something like:

• UnsupportedOperationException in Java
• NotImplementedException in .Net Framework (C#)

Answer 1

You should raise NotImplementedError

raise NotImplementedError 

ruby-doc

Answer 2

You may use the todonotes-gem

There is a documentation with some examples.

It doesn't implement an exception, but a logging mechanism and a possibility for temporary solutions.