vendor/rails/activesupport/lib/active_support/core_ext/float/rounding.rb

   1 module ActiveSupport #:nodoc:
   2   module CoreExtensions #:nodoc:
   3     module Float #:nodoc:
   4       module Rounding
   5         def self.included(base) #:nodoc:
   6           base.class_eval do
   7             alias_method :round_without_precision, :round
   8             alias_method :round, :round_with_precision
   9           end
  10         end
  11
  12         # Rounds the float with the specified precision.
  13         #
  14         #   x = 1.337
  15         #   x.round    # => 1
  16         #   x.round(1) # => 1.3
  17         #   x.round(2) # => 1.34
  18         def round_with_precision(precision = nil)
  19           precision.nil? ? round_without_precision : (self * (10 ** precision)).round / (10 ** precision).to_f
  20         end
  21       end
  22     end
  23   end
  24 end