Why is Method#arity called, well, arity?
methods, ruby, terminology
Solution
Because that's actually the name for it. http://en.wikipedia.org/wiki/Arity
I pronounce it AIR-i-TEE like in polarity.
Problem
In Ruby, I know that `Method#arity` will return a value representing the number of arguments accepted by a method, however I do not know why it is called arity. Can anyone provide some insight into why it would exist in such a seemingly random namespace? Also, how do you pronounce it?