Method with Block at Invocation
Local variable passed to a method as an argument is pretty straightforward: we pass the variable and it is either used or not inside the method.
Block at invocation is a bit different: every method can use a block as an argument but in order to be executed, the method needs to be constructed with
def some_method yield puts 'un mouton !' end some_method do puts 'Dessine-moi...' end # => Dessine-moi... # un mouton !