Lazy sequence returned but not sure why

Asked Nov 06 '15 at 12:53

Active Nov 06 '15 at 13:19

Viewed 54 times

I don't seem to remember that str returns a lazy sequence, yet the following:

(println (str "(" (map identity [1 2 3]) ")"))

produces the output:

(clojure.lang.LazySeq@7861)

and the following does not help

(println (doall (str "(" (map identity [1 2 3]) ")")))

This is stumping me so any help would be appreciated.

EDIT - to address difference from duplicate

My intent is not for printing but was using in problem determination where I found that the lazy-seq return was the source of issue. I need the string to be realized prior to being consumed down-stream.

edited Nov 06 '15 at 13:19

asked Nov 06 '15 at 12:53

Frank C.

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It's not. I'm not concerned about the println per-se but the fact that ```str``` returns a lazy-sequence – Frank C. Nov 06 '15 at 13:20
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`str` returns a string, not a lazy sequence. `(str (map identity [1 2 3]))` evaluates to `"clojure.lang.LazySeq@7861"`. The possible duplicate solution seems to apply. – Thumbnail Nov 06 '15 at 13:37
Thumbnail - Ahh, got-it! – Frank C. Nov 06 '15 at 14:09

Lazy sequence returned but not sure why

0 Answers0