On Wed, Dec 7, 2011 at 8:29 PM, Alan Malloy <[email protected]> wrote:

> On Dec 7, 8:12 pm, Andy Fingerhut <[email protected]> wrote:
> > Ugh.  And if I were slightly lazier at pressing the send button, I would
> > have realized that the laziness of map and remove gives this
> short-circuit
> > evaluation.
> >
> > I generalized your example to allow the notation [- keyfn] as an argument
> > to specify descending order on that key, instead of ascending order.  It
> > doesn't check its arguments carefully, but if you give it correct
> > arguments, it works :-)
>
> Just use comp: (sort-by (multicmp f (comp - g)) coll)
>
>
I don't see how to make that work if the value extracted by function g is
something besides a number, e.g. a string.  Do you see a way?

Thanks,
Andy

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