André Thieme wrote: > (map #(map (fn [s] (Integer/parseInt s)) (.split % "\\s")) (line-seq > (reader "blob.txt"))) An error results: java.lang.Exception: Unable to resolve symbol: reader in this context This works: (map #(map (fn [s] (Integer/parseInt s)) (.split % "\\s")) (.split (slurp "junk") "\r?\n"))