> Hello everybody,
> The evaluation of
> (when-first [[x y z] [1 2 3 4 5]] (+ x y z))
> is returning
> nil
> I was expecting it to return 6 ..
> am I missing something ?
when-first is a macro which will, in the above example get expanded to -
(when (seq [1 2 3 4 5])
(let [[x y z] (first [1 2 3 4 5])]
(+ x y z)))
You can probably see where the problem is... when-first takes the
first item out of the collection that you pass it and tries to bind
it. So in this case, it's trying to bind 1 to [x y z] which is wrong.
May be you want [[1 2 3 4 5]] instead, but I don't know if that
satisfies your requirement.
Regards,
BG
--
Baishampayan Ghose
b.ghose at gmail.com
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