Issue #8827 has been updated by sawa (Tsuyoshi Sawada). Since `then` has been introduced, I think using that is more straightforward. I withdraw this feature. Please close it. ---------------------------------------- Feature #8827: A method that flips the receiver and the first argument https://bugs.ruby-lang.org/issues/8827#change-101274 * Author: sawa (Tsuyoshi Sawada) * Status: Open * Priority: Normal ---------------------------------------- =begin If it often happens that we need to pass to a method an argument that is the result of a long chain of operations: Hash[some_chain_of_operations_that_ends_up_with_an_array] File.read(some_chain_of_operations_that_ends_up_with_a_string) YAML.dump(some_chain_of_operations_that_ends_up_with_an_object) ... I believe one basic tenet of Ruby is to encourage method chaining, but that practice is discouraged in the examples above. It would be convenient if there is a method (let us call this `Object#flip`) that flips the receiver and the first argument and sends the method so that the examples above can be written as follows: some_chain_of_operations_that_ends_up_with_an_array.flip(Hash, :[]) some_chain_of_operations_that_ends_up_with_a_string.flip(File, :read) some_chain_of_operations_that_ends_up_with_an_object.flip(YAML, :dump) ... The implementation in Ruby may be as follows: class Object def flip receiver, method, *rest, &pr receiver.send(method, self, *rest, &pr) end end It would be good if we can have that as a built-in Ruby method. =end -- https://bugs.ruby-lang.org/