Is there a way to access method arguments in Ruby?

Question

New to Ruby and ROR and loving it each day, so here is my question since I have not idea how to google it (and I have tried :) )

we have method

def f         


        

Answer 1

If you need arguments as a Hash, and you don't want to pollute method's body with tricky extraction of parameters, use this:

def mymethod(firstarg, kw_arg1:, kw_arg2: :default)
  args = MethodArguments.(binding) # All arguments are in `args` hash now
  ...
end

Just add this class to your project:

class MethodArguments
  def self.call(ext_binding)
    raise ArgumentError, "Binding expected, #{ext_binding.class.name} given" unless ext_binding.is_a?(Binding)
    method_name = ext_binding.eval("__method__")
    ext_binding.receiver.method(method_name).parameters.map do |_, name|
      [name, ext_binding.local_variable_get(name)]
    end.to_h
  end
end