Changed the implementation of Enumerable#group_by to use a double array approach instead of a hash such that the insert order is honored [DHH/Marcel]
git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@8516 5ecf4fe2-1ee6-0310-87b1-e25e094e27de
This commit is contained in:
parent
07de7612bd
commit
438b108c6b
@ -1,5 +1,7 @@
|
||||
*SVN*
|
||||
|
||||
* Changed the implementation of Enumerable#group_by to use a double array approach instead of a hash such that the insert order is honored [DHH/Marcel]
|
||||
|
||||
* remove multiple enumerations from ActiveSupport::JSON#convert_json_to_yaml when dealing with date/time values. [rick]
|
||||
|
||||
* Hash#symbolize_keys skips keys that can't be symbolized. #10500 [Brad Greenlee]
|
||||
|
@ -15,8 +15,13 @@ module Enumerable
|
||||
# "2006-02-24 -> Transcript, Transcript"
|
||||
# "2006-02-23 -> Transcript"
|
||||
def group_by
|
||||
inject({}) do |groups, element|
|
||||
(groups[yield(element)] ||= []) << element
|
||||
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
|
||||
groups
|
||||
end
|
||||
end if RUBY_VERSION < '1.9'
|
||||
|
Loading…
Reference in New Issue
Block a user