Disadvantages of this approach

• Each call to avail() or next() is a virtual call, with associated overhead

• Using an IntArraySeq destroys it

• We would like to be able to copy IntArraySeq objects

  • We should be able to save an IntArraySeq before we destroy it
  • After we find a particular value, we would like to be able to remember where it was

• We don't want to deal just with integers

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