reduce returns a single value; there's no collection to make lazy.
There is reductions, which returns the intermediate results of reduce
as a lazy sequence.
Justin
On Sep 6, 12:49 pm, Robert McIntyre <r...@mit.edu> wrote:
> I thought that since into uses reduce, it would be lazy, but I was wrong.
> reduce just plows through everything with a non-lazy recursion.
>
> Why is reduce not lazy?
>
> --Robert McIntyre
>
> On Mon, Sep 6, 2010 at 12:37 PM, Michał Marczyk
>
>
>
> <michal.marc...@gmail.com> wrote:
> > On 6 September 2010 18:29, Robert McIntyre <r...@mit.edu> wrote:
> >> walk is good but it's not lazy. If you want to preserve laziness you can
> >> do:
>
> > This won't be lazy, because (into {} ...) is a strict operation.
>
> > I'd suggest something like
>
> > (defn mmap [f m]
> > (zipmap (keys m) (map f (vals m))))
>
> > f is expected to care about the value only.
>
> > Sincerely,
> > Michał
>
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