>>>>> "Jerzy" == Jerzy Karczmarczuk <[EMAIL PROTECTED]> writes:
> The idea of double lists was to permit a fast two-directional
> navigation,
> and the ease of insertion/deletion.
> But in Haskell, where the beasts are not mutable:
> ... Actually, has anybody really used them for practical purposes?
I think that if you want mutable double lists you would use a
representation with before/after lists. Perhaps when you no longer
need mutable access (ie just "tape" operations) you can switch
to a representation with backthreading.
I suppose if there are parliaments of crows there may as well
be bedlams of coroutines.
--
Peter
