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doc source examples comments

1.3.0 permalink

1.2.0
1.3.0

line-seq

clojure.core

(line-seq rdr)

Returns the lines of text from rdr as a lazy sequence of strings.
rdr must implement java.io.BufferedReader.

2 Examples top

link | changes
```
;; Count lines of a file (loses head):
user=> (with-open [rdr (clojure.java.io/reader "/etc/passwd")]
         (count (line-seq rdr)))
```
;; Count lines of a file (loses head): user=> (with-open [rdr (clojure.java.io/reader "/etc/passwd")] (count (line-seq rdr)))
link | changes
```
(import '(java.io BufferedReader StringReader))

;; line terminators are stripped
user=> (line-seq (BufferedReader. (StringReader. "1\n2\n\n3")))
("1" "2" "" "3")

;; empty string gives nil
user=> (line-seq (BufferedReader. (StringReader. "")))
nil
```
(import '(java.io BufferedReader StringReader)) ;; line terminators are stripped user=> (line-seq (BufferedReader. (StringReader. "1\n2\n\n3"))) ("1" "2" "" "3") ;; empty string gives nil user=> (line-seq (BufferedReader. (StringReader. ""))) nil

Source clojure/core.clj:2670 top

(defn line-seq
  "Returns the lines of text from rdr as a lazy sequence of strings.
  rdr must implement java.io.BufferedReader."
  {:added "1.0"
   :static true}
  [^java.io.BufferedReader rdr]
  (when-let [line (.readLine rdr)]
    (cons line (lazy-seq (line-seq rdr)))))

Vars in clojure.core/line-seq:

Used in 0 other vars

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Clojure Core

Namespaces

line-seq

clojure.core

2 Examples top

See Also top

Source clojure/core.clj:2670 top

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