[Request] Easily access all keyword arguments within a method
As a developer, I'd like to leverage the power of keyword arguments (requirements, defaults, etc) and then be able to access a hash of all the arguments supplied.
def foo(bar:, baz: 1, qux: 2...) post('/', body: kargs) end
This is currently possible by leveraging the RubyVM debug inspector and some meta programming to retrieve the binding and name of the calling method. There is a gem https://github.com/banister/binding_of_caller that abstracts away the logic of crawling through the frame bindings in the debug inspector to find the binding of the caller, but I feel like this functionality would be useful in Ruby.
With the binding_of_caller gem, you can hack together a kargs method like so:
def kargs method(caller_locations(1,1).label).parameters.map do |(_type, name)| [name, binding.of_caller(2).local_variable_get(name)] end.to_h end
This gets the name of the calling method, pulls the local variables from the method, retrieves the binding, and then retrieves the variables from the binding. By exposing a simpler API to retrieve the caller binding, a
kargs method could be added to Ruby fairly easily I would think.