diff options
Diffstat (limited to 'railties/guides/source/active_support_core_extensions.textile')
| -rw-r--r-- | railties/guides/source/active_support_core_extensions.textile | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/railties/guides/source/active_support_core_extensions.textile b/railties/guides/source/active_support_core_extensions.textile index e0b1bf6e83..788f528654 100644 --- a/railties/guides/source/active_support_core_extensions.textile +++ b/railties/guides/source/active_support_core_extensions.textile @@ -1045,6 +1045,8 @@ NOTE: Defined in +active_support/core_ext/class/attribute_accessors.rb+. h4. Class Inheritable Attributes +WARNING: Class Inheritable Attributes are deprecated. It's recommended that you use +Class#class_attribute+ instead. + Class variables are shared down the inheritance tree. Class instance variables are not shared, but they are not inherited either. The macros +class_inheritable_reader+, +class_inheritable_writer+, and +class_inheritable_accessor+ provide accessors for class-level data which is inherited but not shared with children: <ruby> @@ -1816,7 +1818,7 @@ h3. Extensions to +Float+ h4. +round+ -The built-in method +Float#round+ rounds a float to the nearest integer. Active Support adds an optional parameter to let you specify a precision: +The built-in method +Float#round+ rounds a float to the nearest integer. In Ruby 1.9 this method takes an optional argument to let you specify a precision. Active Support adds that functionality to +round+ in previous versions of Ruby: <ruby> Math::E.round(4) # => 2.7183 @@ -2009,7 +2011,7 @@ That syntactic sugar is used a lot in Rails to avoid positional arguments where If a method expects a variable number of arguments and uses <tt>*</tt> in its declaration, however, such an options hash ends up being an item of the array of arguments, where it loses its role. -In those cases, you may give an options hash a distinguished treatment with +extract_options!+. That method checks the type of the last item of an array. If it is a hash it pops it and returns it, otherwise returns an empty hash. +In those cases, you may give an options hash a distinguished treatment with +extract_options!+. This method checks the type of the last item of an array. If it is a hash it pops it and returns it, otherwise it returns an empty hash. Let's see for example the definition of the +caches_action+ controller macro: |