Issue #7739 has been updated by rosenfeld (Rodrigo Rosenfeld Rosas). Thomas, with regards to your example, I'd agree with all of it but aliasing #| to #reverse_merge instead of #merge. Having said that, in case the options are aliasing #| to #reverse_merge or not aliasing it at all, I'd prefer the former. ---------------------------------------- Feature #7739: Define Hash#| as Hash#reverse_merge in Rails https://bugs.ruby-lang.org/issues/7739#change-41260 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 -- http://bugs.ruby-lang.org/