I've found a bit of an annoyance trying to find out if a number is numeric
or not. I thought it would probably be a simple string method but I found
far more contrived solutions like regex matches. Eventually I settled on
monkey patching string with a Numeric? method using Float(self)! = nil
rescue false.

Is there a better way to go about this? If not, can we get something added
to the core?

Thanks for your time,

Brandon