[plt-scheme] How to perform a union between two lists?

See also soegaard/galore.plt on PLaneT (which gives an efficient
implementation of sets) and the SRFI-1 lset-* operations (which give
implementations of all the standard set operations for sets
represented as lists).

-jacob

On 5/6/07, Robby Findler <robby at cs.uchicago.edu> wrote:
> On 5/6/07, Eli Barzilay <eli at barzilay.org> wrote:
> > On May  6, Grant Rettke wrote:
> > > Hi folks,
> > >
> > > What is the best way to perform a union between two lists?
> >
> > Simple, and not too efficient:
> >
> >   (append l1 (remv* l1 l2))
>
> But if you're using lists to represent sets, you presumably aren't too
> too worried about efficiency (and you can't really do a lot better
> than that w/ lists anyway).
>
> Robby
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