Whats the point of lazy-seq in clojure?
- by dbyrne
I am looking through some example Fibonacci sequence clojure code:
(def fibs (lazy-cat [1 2] (map + fibs (rest fibs))))
I generally understand what is going on, but don't quite understand the point of lazy-cat.
I know that lazy-cat is a macro that is translating to something like this:
(def fibs (concat (lazy-seq [1 2]) (lazy-seq (map + fibs (rest fibs)))))
What exactly is lazy-seq accomplishing? It would still be evaluated lazily even without lazy-seq? Is this strictly for caching purposes?
