class String

def underscore


"ActiveRecord::Errors".underscore # => active_record/errors
"ActiveRecord".underscore # => "active_record"

+underscore+ will also change '::' to '/' to convert namespaces to paths.

The reverse of +camelize+. Makes an underscored, lowercase form from the expression in the string.
# 
def underscore
  ActiveSupport::Inflector.underscore(self)
end