diff options
Diffstat (limited to 'railties/guides')
-rw-r--r-- | railties/guides/source/active_support_core_extensions.textile | 36 |
1 files changed, 20 insertions, 16 deletions
diff --git a/railties/guides/source/active_support_core_extensions.textile b/railties/guides/source/active_support_core_extensions.textile index de0c00ac68..58824d7aeb 100644 --- a/railties/guides/source/active_support_core_extensions.textile +++ b/railties/guides/source/active_support_core_extensions.textile @@ -1107,47 +1107,51 @@ If for whatever reason an application loads the definition of a mailer class and NOTE: Defined in +active_support/core_ext/class/delegating_attributes.rb+. -h4. Descendants & Subclasses +h4. Subclasses & Descendants -h5. +descendants+ +h5. +subclasses+ -The +descendants+ method returns all classes, including its children, that inherits from self. +The +subclasses+ method returns the subclasses of the receiver: <ruby> class C; end -C.descendants #=> [] +C.subclasses # => [] class B < C; end -C.descendants #=> [B] +C.subclasses # => [B] class A < B; end -C.descendants #=> [B, A] +C.subclasses # => [B] class D < C; end -C.descendants #=> [B, A, D] +C.subclasses # => [B, D] </ruby> -h5. +subclasses+ +The order in which these classes are returned is unspecified. -The +subclasses+ method returns all direct classes that inherits from self. +WARNING: This method is redefined in some Rails core classes but should be all compatible in Rails 3.1. + +NOTE: Defined in +active_support/core_ext/class/subclasses.rb+. + +h5. +descendants+ + +The +descendants+ method returns all classes that are <tt><</tt> than its receiver: <ruby> class C; end -C.subclasses #=> [] +C.descendants # => [] class B < C; end -C.subclasses #=> [B] +C.descendants # => [B] class A < B; end -C.subclasses #=> [B] +C.descendants # => [B, A] class D < C; end -C.subclasses #=> [B, D] +C.descendants # => [B, A, D] </ruby> -The order in which these class are returned is unspecified. - -WARNING: This method is redefined in some Rails core classes but should be all compatible in Rails 3.1. +The order in which these classes are returned is unspecified. NOTE: Defined in +active_support/core_ext/class/subclasses.rb+. |