diff options
| -rw-r--r-- | guides/source/initialization.textile | 29 |
1 files changed, 26 insertions, 3 deletions
diff --git a/guides/source/initialization.textile b/guides/source/initialization.textile index d627c37400..fb205bd658 100644 --- a/guides/source/initialization.textile +++ b/guides/source/initialization.textile @@ -572,11 +572,34 @@ end These methods can be used to silence STDERR responses and the +silence_stream+ allows you to also silence other streams. Additionally, this mixin allows you to suppress exceptions and capture streams. For more information see the "Silencing Warnings, Streams, and Exceptions":active_support_core_extensions.html#silencing-warnings-streams-and-exceptions section from the Active Support Core Extensions Guide. -h4. +active_support/core_ext/logger.rb+ +h4. +active_support/core_ext/array/extract_options.rb+ -The next file that is required is another Active Support core extension, this time to the +Logger+ class. This begins by defining the +around_[level]+ helpers for the +Logger+ class as well as other methods such as a +datetime_format+ getter and setter for the +formatter+ object tied to a +Logger+ object. +The next file that is required is another Active Support core extension, +this time to the +Array+ and +Hash+ classes. This file defines an ++extract_options!+ method which Rails uses to extract options from +parameters. -For more information see the "Extensions to Logger":active_support_core_extensions.html#extensions-to-logger section from the Active Support Core Extensions Guide. +<ruby> +class Array + # Extracts options from a set of arguments. Removes and returns the + # last + # element in the array if it's a hash, otherwise returns a blank hash. + # + # def options(*args) + # args.extract_options! + # end + # + # options(1, 2) # => {} + # options(1, 2, :a => :b) # => {:a=>:b} + def extract_options! + if last.is_a?(Hash) && last.extractable_options? + pop + else + {} + end + end +end +</ruby> h4. +railties/lib/rails/application.rb+ |