Looping variables in a clojure "for" loop are iterated in a serial,
cartesian fashion:
> (for [a (range 5) b (range 10 15)]
(+ a b))
(10 11 12 13 14 11 12 13 14 15 12 13 14 15 16 13 14 15 16 17 14 15 16
17 18)
I was wondering if there's a standard idiom for looping in parallel
fashion- Doesn't look like it's supported by the "for" macro directly.
The best code I can come up with to do this is:
> (for [[a b] (map vector (range 5) (range 10 15))]
(+ a b))
(10 12 14 16 18)
Is there a more elegant way to do this? (Of course, having parallel
for loop variables is only valuable if you have a more complex loop-
For this simple example you could write this in a nicer way by not
using a "for" loop at all)
On a side note, is there a good reason why "range" with no parameters
doesn't just return the whole numbers? Then I wouldn't have to pepper
my code with (iterate inc 0) everywhere...
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