Created
August 30, 2013 02:30
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problem: | |
1. give a list, 1 to 10 | |
2. get even number | |
3. divided by two | |
4. print them |
scala
lazy version
Stream.from(1).filter(_ % 2 == 0).map(_ / 2).take(5).foreach(println)
common version
Range(1,11).filter(_%2 == 0).map(_/2).map(println)
ruby
(1..10).select{|x| x % 2 == 0}.map{|x| x / 2}.each{|x| puts x}
clojure
lazy version
(take 5 (for [x (iterate inc 1) :when (zero? (rem x 2))] (/ x 2)))
or
(take 5 (map (fn [x] (/ x 2)) (filter even? (iterate inc 1))))
common version
(print (map (fn [a] (/ a 2)) (filter even? (range 1 11))))
or
(println (map #(/ %1 2) (filter even? (range 10))))
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