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class

Object

v3.0.9 - Show latest stable - Superclass: Object

Most objects are cloneable, but not all. For example you can’t dup nil:

nil.dup # => TypeError: can't dup NilClass

Classes may signal their instances are not duplicable removing dup/clone or raising exceptions from them. So, to dup an arbitrary object you normally use an optimistic approach and are ready to catch an exception, say:

arbitrary_object.dup rescue object

Rails dups objects in a few critical spots where they are not that arbitrary. That rescue is very expensive (like 40 times slower than a predicate), and it is often triggered.

That’s why we hardcode the following cases and check duplicable? instead of using that rescue idiom.

Included modules

  • Benchmark
  • FileUtils
  • Java
  • Rails::BacktraceFilterForTestUnit
  • RequireProfiler
  • W3CValidators

Constants

ALL = Mime::Type.new("*/*", :all, [])

AbstractRequest = ActionController::Request = ActionDispatch::Request

AbstractResponse = ActionController::Response = ActionDispatch::Response

FRAMEWORKS = %w( activesupport activemodel activerecord activeresource actionpack actionmailer railties )

HashWithIndifferentAccess = ActiveSupport::HashWithIndifferentAccess

Integration = ActionDispatch::Integration

IntegrationTest = ActionDispatch::IntegrationTest

MissingSourceFile = LoadError

N = Integer(ARGV.first)

PerformanceTest = ActionDispatch::PerformanceTest

Routing = ActionDispatch::Routing

TIMES = (ENV['N'] || 10000).to_i

Files

  • actionpack/lib/action_controller/deprecated.rb
  • actionpack/lib/action_controller/deprecated/integration_test.rb
  • actionpack/lib/action_controller/deprecated/performance_test.rb
  • actionpack/lib/action_dispatch/http/mime_types.rb
  • activerecord/examples/performance.rb
  • activesupport/lib/active_support/core_ext/kernel/agnostics.rb
  • activesupport/lib/active_support/core_ext/load_error.rb
  • activesupport/lib/active_support/core_ext/object/acts_like.rb
  • activesupport/lib/active_support/core_ext/object/blank.rb
  • activesupport/lib/active_support/core_ext/object/duplicable.rb
  • activesupport/lib/active_support/core_ext/object/instance_variables.rb
  • activesupport/lib/active_support/core_ext/object/returning.rb
  • activesupport/lib/active_support/core_ext/object/to_param.rb
  • activesupport/lib/active_support/core_ext/object/to_query.rb
  • activesupport/lib/active_support/core_ext/object/try.rb
  • activesupport/lib/active_support/core_ext/object/with_options.rb
  • activesupport/lib/active_support/core_ext/string/output_safety.rb
  • activesupport/lib/active_support/core_ext/uri.rb
  • activesupport/lib/active_support/hash_with_indifferent_access.rb
  • activesupport/lib/active_support/json/encoding.rb
  • activesupport/lib/active_support/xml_mini/jdom.rb
  • ci/ci_build.rb
  • railties/guides/rails_guides.rb
  • railties/guides/w3c_validator.rb
  • railties/lib/rails/commands/benchmarker.rb
  • railties/lib/rails/commands/plugin.rb
  • railties/lib/rails/console/app.rb
  • railties/lib/rails/console/helpers.rb
  • railties/lib/rails/generators/rails/scaffold_controller/templates/controller.rb
  • railties/lib/rails/test_help.rb
  • tasks/release.rb
  • tools/profile