Wrong and right way to parse a file in Clojure

load-csv.clj

;dummy.csv is of format "1,2,3\n4,5,6\n"

;fails since everything is lazy (but works if you do something that forces resolution)
(with-open [r (reader "file:///home/brycen/dummy.csv")]
  (for [lines (read-csv r)]
    (zipmap [:x :y :z] lines)))

;Doesn't close "properly" (but works most of the time)
(for [lines (read-csv (reader "file:///home/brycen/dummy.csv"))]
  (zipmap [:x :y :z] lines))

;Dumps file, then parses it.  Slurp handles closing.  
(for [lines (read-csv (slurp "file:///home/brycen/dummy.csv"))]
  (zipmap [:x :y :z] lines))