回答編集履歴
1
Update
test
CHANGED
|
@@ -1,5 +1,5 @@
|
|
|
1
1
|
```ruby
|
|
2
|
-
p hoge.group_by{|i| i[:y]}.map{|_, e| e.select{|i| i[:x]}[0]}
|
|
2
|
+
p hoge.group_by{|i| i[:y]}.map{|_, e| e.select{|i| i[:x]}[0] || e[0]}
|
|
3
3
|
|
|
4
4
|
#
|
|
5
5
|
# [{:x=>"n2", :y=>1}, {:x=>"n2", :y=>5}]
|