Blocks and objects

Question

I have an object like this

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class SomeObject
  def initialize &block
    # do something
  end
end

class AnotherObject < SomeObject
  def initalize &block
    super
    # do something with block
  end
end

When super is called in AnotherObject, the block seems to be passed to SomeObject. Is this the right behaviour and is there away round it?

Answer 1

According to rubyspec this is the correct behaviour, even if you pass explicit arguments to super (i.e. super('foo'))

If you don't want to pass that block, you could just pass a block that does nothing, although this isn't quite the same thing (e.g. if the method changes its behaviour based on block_given?)

It appears that

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super(&nil)

is a way to pass no block at all to super, although I couldn't find this in ruby spec.