Issue #6373 has been updated by charliesome (Charlie Somerville).


I think out of all the options proposed, 'identity' is the most readable/quickly understandable.

For example, I think the use of 'identity' here reads very nicely in [1,2,3,4].group_by(&:identity)



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Feature #6373: public #self
https://bugs.ruby-lang.org/issues/6373#change-40108

Author: trans (SYSTEM ERROR)
Status: Feedback
Priority: Normal
Assignee: matz (Yukihiro Matsumoto)
Category: core
Target version: next minor


=begin
This was recently suggested to me as an extension:

  class Object
    # An identity method that provides access to an object's 'self'.
    #
    # Example:
    #   [1,2,3,4,5,1,2,2,3].group_by(&:identity)
    #   #=> {1=>[1, 1], 2=>[2, 2, 2], 3=>[3, 3], 4=>[4], 5=>[5]}
    #
    def identity
      self
    end
  end

First, is such a method commonly useful enough to warrant existence?

Second, it makes me wonder if #self should be a public method in general.
=end


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