Created
April 18, 2012 06:56
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Does not hold the head of a sequance only its first element and the generating function.
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| (defn crazy-seq [head f] | |
| (reify | |
| clojure.lang.ISeq | |
| (first [_] head) | |
| (more [_] (crazy-seq (f head) f)) | |
| (next [this] (rest this)) | |
| (seq [this] this) | |
| (equiv [_ _] false))) | |
| (def s (crazy-seq 0 inc)) ; hold head | |
| (dorun (take 100000000 s)) ; low fat | |
| (nth s 10) ; recomputes | |
| ;=> 10 |
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