ruby-uebungen/Assignment_040/solution

Lösung: Eigenclass einer Klasse

```ruby class Numeric class << self def to_binary(n) n.to_s(2) end end end

puts Numeric::to_binary(47)

Alternative Lösung:

```ruby
class << Numeric
  def to_binary(n)
    n.to_s(2)
  end
end

puts Numeric::to_binary(47)