class String

"active_record/errors".camelize(:lower) # => "activeRecord::Errors"
"active_record/errors".camelize # => "ActiveRecord::Errors"
"active_record".camelize(:lower) # => "activeRecord"
"active_record".camelize # => "ActiveRecord"

+camelize+ will also convert '/' to '::' which is useful for converting paths to namespaces.

is set to :lower then camelize produces lowerCamelCase.
By default, +camelize+ converts strings to UpperCamelCase. If the argument to camelize
#

def camelize(first_letter = :upper)
  case first_letter
    when :upper then ActiveSupport::Inflector.camelize(self, true)
    when :lower then ActiveSupport::Inflector.camelize(self, false)
  end
end