@hash[size] ||= []
      @hash[size].push(ary)

Hashed by sizes and array for storing tuples of one size

Can we use tree of hashes here instead of hash of arrays? It can be
useful for any hierarchical data pushed into TupleBag, if we have a
lot of tuples with same length (e.g. rdf or xml data).


-- 
WBR, Alex V Breger