On Sep 18, 6:24 am, Wilson MacGyver <wmacgy...@gmail.com> wrote:
> Hmmm, your solution produces nils in REPL.
>
> user=> (map #(printf "Happy Birthday %s\n" (if (= 2 %) "Dear XXX" "To
> You")) (range 4))
> (Happy Birthday To You
> Happy Birthday To You
> nil Happy Birthday Dear XXX
> nil Happy Birthday To You
> nil nil)
Yes, the result of the computation is (nil nil nil nil), a side-effect
is printing:
Happy Birthday To You
Happy Birthday To You
Happy Birthday Dear XXX
Happy Birthday To You.
I thought you wanted to print since the Scala and Java programs
print.
If you want to compute, you could use
(map #(str "Happy Birthday " (if (= 2 %) "Dear XXX" "To You")) (range
4))
If you want to print, and avoid a list of nils, you could use
(dotimes [i 4] (printf "Happy Birthday %s\n" (if (= 2 i) "Dear XXX"
"To You")))
which is essentially the Java version.
Incidentally,
user> (count "(dotimes [i 4] (printf \"Happy Birthday %s\n\" (if (= 2
i) \"Dear XXX\" \"To You\")))")
78
/Karl
/Karl
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