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Feature #8827
closedA method that flips the receiver and the first argument
Status:
Closed
Assignee:
-
Target version:
-
Description
=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
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