A method that flips the receiver and the first argument
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.