[#91458] [Ruby trunk Feature#4475] default variable name for parameter — matz@...
Issue #4475 has been updated by matz (Yukihiro Matsumoto).
3 messages
2019/02/07
[ruby-core:91465] [Ruby trunk Feature#11076] Enumerable method count_by
From:
mame@...
Date:
2019-02-07 08:10:19 UTC
List:
ruby-core #91465
Issue #11076 has been updated by mame (Yusuke Endoh).
Assignee changed from mame (Yusuke Endoh) to nobu (Nobuyoshi Nakada)
Nobu has already started creating a patch. Leave it to him.
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Feature #11076: Enumerable method count_by
https://bugs.ruby-lang.org/issues/11076#change-76726
* Author: haraldb (Harald B旦ttiger)
* Status: Assigned
* Priority: Normal
* Assignee: nobu (Nobuyoshi Nakada)
* Target version:
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I very often use `Hash[array.group_by{|x|x}.map{|x,y|[x,y.size]}]`.
Would be nice with to have a method called `count_by`:
~~~ruby
array = ['aa', 'aA', 'bb', 'cc']
p array.count_by(&:downcase) #=> {'aa'=>2,'bb'=>1,'cc'=>1}
~~~
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