diff options
Diffstat (limited to 'railties/guides/source/active_support_core_extensions.textile')
| -rw-r--r-- | railties/guides/source/active_support_core_extensions.textile | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/railties/guides/source/active_support_core_extensions.textile b/railties/guides/source/active_support_core_extensions.textile index de82e871a6..6c3a005daf 100644 --- a/railties/guides/source/active_support_core_extensions.textile +++ b/railties/guides/source/active_support_core_extensions.textile @@ -1927,13 +1927,23 @@ Similarly, +from+ returns the tail from the element at the passed index on: The methods +second+, +third+, +fourth+, and +fifth+ return the corresponding element (+first+ is builtin). Thanks to social wisdom and positive constructiveness all around, +forty_two+ is also available. -You can pick a random element with +random_element+: +NOTE: Defined in +active_support/core_ext/array/access.rb+. + +h4. Random Access + +Active Support backports +sample+ from Ruby 1.9: + +You can pick a random element with +sample+: <ruby> -shape_type = [Circle, Square, Triangle].random_element +shape_type = [Circle, Square, Triangle].sample +# => Square, for example + +shape_types = [Circle, Square, Triangle].sample(2) +# => [Triangle, Circle], for example </ruby> -NOTE: Defined in +active_support/core_ext/array/access.rb+. +NOTE: Defined in +active_support/core_ext/array/random_access.rb+. h4. Options Extraction |