diff options
Diffstat (limited to 'activesupport/lib/active_support/core_ext/enumerable.rb')
-rw-r--r-- | activesupport/lib/active_support/core_ext/enumerable.rb | 37 |
1 files changed, 0 insertions, 37 deletions
diff --git a/activesupport/lib/active_support/core_ext/enumerable.rb b/activesupport/lib/active_support/core_ext/enumerable.rb index d9856f2e84..ccd0e9692d 100644 --- a/activesupport/lib/active_support/core_ext/enumerable.rb +++ b/activesupport/lib/active_support/core_ext/enumerable.rb @@ -1,41 +1,4 @@ -require 'active_support/ordered_hash' - module Enumerable - # Ruby 1.8.7 introduces group_by, but the result isn't ordered. Override it. - remove_method(:group_by) if [].respond_to?(:group_by) && RUBY_VERSION < '1.9' - - # Collect an enumerable into sets, grouped by the result of a block. Useful, - # for example, for grouping records by date. - # - # Example: - # - # latest_transcripts.group_by(&:day).each do |day, transcripts| - # p "#{day} -> #{transcripts.map(&:class).join(', ')}" - # end - # "2006-03-01 -> Transcript" - # "2006-02-28 -> Transcript" - # "2006-02-27 -> Transcript, Transcript" - # "2006-02-26 -> Transcript, Transcript" - # "2006-02-25 -> Transcript" - # "2006-02-24 -> Transcript, Transcript" - # "2006-02-23 -> Transcript" - def group_by - return to_enum :group_by unless block_given? - assoc = ActiveSupport::OrderedHash.new - - each do |element| - key = yield(element) - - if assoc.has_key?(key) - assoc[key] << element - else - assoc[key] = [element] - end - end - - assoc - end unless [].respond_to?(:group_by) - # Calculates a sum from the elements. Examples: # # payments.sum { |p| p.price * p.tax_rate } |