currying an instance method

foo.rb

class Foo
  def foo(x, y)
    "foo! #{x} and #{y}"
  end

  def bar
    # my imaginary syntax for "create functional reference from method foo with argument bar.
    &(:foo, 5)
  end
end

# Foo.new.bar(10).call
#  => "foo! 5 and 10"