From: "phluid61 (Matthew Kerwin)" <matthew@...>
Date: 2013-08-19T07:08:00+09:00
Subject: [ruby-core:56733] [ruby-trunk - Feature #7739] Define Hash#| as	Hash#reverse_merge in Rails


Issue #7739 has been updated by phluid61 (Matthew Kerwin).


=begin
I still believe the original proposal is the most useful:

    class Hash
      def | other_hash
        other_hash.merge self
      end
    end

Or, if taking the code from active support:

    class Hash
      def reverse_merge(other_hash) other_hash.merge(self); end
      alias :| :reverse_merge
    end

Use-case:

    def foo options={}
      options |= {a:1, b:2}
    end


Note: this is different from kwargs if you're going to operate on the hash as a whole:

    def foo options={}
      options |= {a: 1, b: 2}
      do_something_with options
    end
    
    def bar a: 1, b: 2, **options
      #do_something_with( {a: a, b: b} + options ) ??
    end

=end

----------------------------------------
Feature #7739: Define Hash#| as Hash#reverse_merge in Rails
https://bugs.ruby-lang.org/issues/7739#change-41262

Author: alexeymuranov (Alexey Muranov)
Status: Assigned
Priority: Normal
Assignee: matz (Yukihiro Matsumoto)
Category: core
Target version: next minor


=begin
I suggest for to define (({Hash#|})) as (({Hash#reverse_merge})) in ((*Rails*)), in my opinion this would correspond nicely to (({Set#|})), to the logical (({#||})) and to the bitwise (({#|})):

  { :a => 1, :b => 2 } | { :b => 1, :c => 2 }  # => { :a => 1, :b => 1, :c => 2 }
=end



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