diff options
| -rw-r--r-- | activesupport/lib/active_support/core_ext/enumerable.rb | 11 |
1 files changed, 3 insertions, 8 deletions
diff --git a/activesupport/lib/active_support/core_ext/enumerable.rb b/activesupport/lib/active_support/core_ext/enumerable.rb index 8a097dcd90..a49c4c701b 100644 --- a/activesupport/lib/active_support/core_ext/enumerable.rb +++ b/activesupport/lib/active_support/core_ext/enumerable.rb @@ -23,14 +23,9 @@ module Enumerable #:nodoc: # "2006-02-24 -> Transcript, Transcript" # "2006-02-23 -> Transcript" def group_by - inject([]) do |groups, element| - value = yield(element) - if (last_group = groups.last) && last_group.first == value - last_group.last << element - else - groups << [value, [element]] - end + inject({}) do |groups, element| + (groups[yield(element)] ||= []) << element groups end - end + end end |