From: "alexeymuranov (Alexey Muranov)" <redmine@...>
Date: 2012-11-10T19:19:41+09:00
Subject: [ruby-core:49192] [ruby-trunk - Feature #6721] Object#yield_self


Issue #6721 has been updated by alexeymuranov (Alexey Muranov).


=begin
After commenting on #6284, i have a new proposition for this method's name: (({Object#^})).  Also, i suggest to allow it to take a block, a proc, a lambda, or a symbol.  I think this will not conflict with existing uses of #^, however the classes that implement it for certain argument types should not forget to call (({super})) if the argument type is not recognized by them.

For example:

  # Formatting a string:
  format_as_title = lambda { |str| "Title: #{ str.strip.capitalize }" }
  title = " something to be a title " ^ format_as_title     # instead of  `format_as_title.call(" something to be a title  ")`

  # Squareing the 2:
  four = 2 ^ { |x| x*x }                                    # instead of `four = 2�**2`

  # Converting a string to an integer:
  five = "5" ^ :to_i                                        # instead of `five = "5".to_i`

This is consistent with a rare mathematical notation for function application: sometimes instead of  "f(x)",  the "exponential" notation  "x^f" is used.

This would also open a door to compose lambdas from left to right, if the majority decides so (this is being discussed in #6284)
=end

----------------------------------------
Feature #6721: Object#yield_self
https://bugs.ruby-lang.org/issues/6721#change-32742

Author: alexeymuranov (Alexey Muranov)
Status: Open
Priority: Normal
Assignee: 
Category: core
Target version: next minor


=begin
I think the following method is missing from Ruby:

 class Object
   def yield_self(*args)
     yield(self, *args)
   end
 end

I do not know a good use case, but it looks very natural to me.  It can be used in method chains.

What do you think?  Is there an alternative?
=end



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