to_proc.rb

# This:
class String
  def to_proc
    split('.').to_proc
  end
end

class Array
  def to_proc
    lambda do |obj|
      inject(obj) do |value, method|
        value = value.send(method)
      end
    end
  end
end

# Means you can do:
%w(hello world).map(&'upcase.bytes')   # => [[72, 69, 76, 76, 79], [87, 79, 82, 76, 68]]
%w(hello world).map(&[:upcase, :bytes]) # => [[72, 69, 76, 76, 79], [87, 79, 82, 76, 68]]

# BONUS
# Extra silly (functional-like) implementation
class Array
  def self.to_proc
    lambda do |arr|
      lambda do |obj|
        arr.inject(obj) do |value, method|
          value = value.send(method)
        end
      end
    end
  end

  def to_proc
    self.class.to_proc.(self)
  end
end

method_chain_maker = Array.to_proc
chain_one = method_chain_maker.([:upcase, :bytes]) # Make as many chains as you want

%w(hello world).map(&chain_one) # => [[72, 69, 76, 76, 79], [87, 79, 82, 76, 68]]