vendor/rails/activesupport/lib/active_support/core_ext/object/instance_variables.rb

   1 class Object
   2   # Available in 1.8.6 and later.
   3   unless respond_to?(:instance_variable_defined?)
   4     def instance_variable_defined?(variable)
   5       instance_variables.include?(variable.to_s)
   6     end
   7   end
   8
   9   def instance_values #:nodoc:
  10     instance_variables.inject({}) do |values, name|
  11       values[name.to_s[1..-1]] = instance_variable_get(name)
  12       values
  13     end
  14   end
  15
  16   def copy_instance_variables_from(object, exclude = []) #:nodoc:
  17     exclude += object.protected_instance_variables if object.respond_to? :protected_instance_variables
  18
  19     vars = object.instance_variables.map(&:to_s) - exclude.map(&:to_s)
  20     vars.each { |name| instance_variable_set(name, object.instance_variable_get(name)) }
  21   end
  22 end