Hey all,
I am working through the problems on project euler. On question
number 11 (http://projecteuler.net/index.php?section=problems&id=11),
I was unable to come up with a solution, so I cheated and looked at
some other people's answer's here:
http://clojure-euler.wikispaces.com/Problem+011
Unfortunately, I am so dumb I cannot even understand the solutions
very well...hahhaha. The first solution on that page defines the
following function:
(defn select-dir [array x y ncol span fnx fny]
(when (not (zero? span))
(lazy-cons
(array-get array x y ncol)
(select-dir array (fnx x) (fny y) ncol (dec span) fnx fny))))
Right off the bat, I am wondering what is lazy-cons? I could not find
it in the api.
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