Aaron Sherman wrote:
It seems to me that there are three core attributes, each of which has two states:

    Mutability: true, false
    Laziness: true, false
    Ordered: true, false

I think there's a 4th: exclusivity: whether or not duplicate elements are permitted/exposed (i.e. the difference between a set and a bag). This is orthogonal to orderedness.

Reply via email to