vendor/rails/activesupport/lib/active_support/core_ext/proc.rb

   1 class Proc #:nodoc:
   2   def bind(object)
   3     block, time = self, Time.now
   4     (class << object; self end).class_eval do
   5       method_name = "__bind_#{time.to_i}_#{time.usec}"
   6       define_method(method_name, &block)
   7       method = instance_method(method_name)
   8       remove_method(method_name)
   9       method
  10     end.bind(object)
  11   end
  12 end