Marcin 'Qrczak' Kowalczyk <xxxxxx@knm.org.pl> writes: > Thomas Bushnell BSG <xxxxxx@becket.net> writes: > >> An implementation could use sparse arrays for long arrays with empty >> space and linear arrays for those which are compact. What is wrong >> with that? > > Why no implementation does it? I can't parse that sentence, sorry. The point here, if you cannot recall, is that it was claimed (incorrectly) that there was no need to support bignums as array indices. That claim was incorrect. Thomas