diff options
Diffstat (limited to 'activesupport/lib/active_support/core_ext/enumerable.rb')
-rw-r--r-- | activesupport/lib/active_support/core_ext/enumerable.rb | 58 |
1 files changed, 0 insertions, 58 deletions
diff --git a/activesupport/lib/active_support/core_ext/enumerable.rb b/activesupport/lib/active_support/core_ext/enumerable.rb index 9343bb7106..77a5087981 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 } @@ -63,27 +26,6 @@ module Enumerable end end - # Iterates over a collection, passing the current element *and* the - # +memo+ to the block. Handy for building up hashes or - # reducing collections down to one object. Examples: - # - # %w(foo bar).each_with_object({}) { |str, hsh| hsh[str] = str.upcase } - # # => {'foo' => 'FOO', 'bar' => 'BAR'} - # - # *Note* that you can't use immutable objects like numbers, true or false as - # the memo. You would think the following returns 120, but since the memo is - # never changed, it does not. - # - # (1..5).each_with_object(1) { |value, memo| memo *= value } # => 1 - # - def each_with_object(memo) - return to_enum :each_with_object, memo unless block_given? - each do |element| - yield element, memo - end - memo - end unless [].respond_to?(:each_with_object) - # Convert an enumerable to a hash. Examples: # # people.index_by(&:login) |