Not that preserves the short-circuiting behavior of 'and. This works
though:
(defmacro andf [& fns]
(let [x# (gensym)]
`(fn [~x#] (and ~@(map #(list % x#) fns)))))
user=> (filter (andf integer? odd?) [1 2 3.1])
(1)
On Jul 23, 2:27 pm, ".Bill Smith" <william.m.sm...@gmail.com> wrote:
> I want to filter a list based on the logical AND of a set of
> predicates. For example, let's say I have single-argument functions
> f, g, and h (without side-effects), and I want those items x in the
> list such that (f x), (g x) and (h x) are all true. I know I can do
> this:
>
> (filter #(and (f %) (g %) (h %)) my-list)
>
> Is there a more terse way to express the same thing? I suspect there
> is a mechanism similar to (or perhaps a generalization of) composition
> for that, but I couldn't find it in the API docs.
>
> Bill Smith
> Austin, TX
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