I know that loo exists - and I'm puzzled by what the lazy functions
do.
What I think would be interesting functionality is to have an emitter/
collector combination, for example:
(collect
(doseq [ n (range 10)]
(when (even? n) (emit n))))
would return the list (0 2 4 6 8). Any ideas how I could implement
this?
You might ask why anybody would want this. Well, I think it would be
neat because it separates your logic from actual looping mechanics.
I'm saying "I don't care how the list is constructed, just as long as
it is". I know there are functions like filter that would be better
in this particular example - but I'm only using it for illustrative
purposes.
It would also allow you do do something like
(collect
(doseq [ n (range 10)]
(when (even? n)
(emit n)
(emit (* 2 n)))))
to give you the list (0 0 2 4 4 8 6 12 8 16). Admittedly this
particular example might not be of much use; but the general idea is
that it allows you to collect all sorts of weird and wonderful things,
possibly involving complicated logic as to when/if you want things
collection.
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