clojure.core/file-seq

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Type: function Added: Clojure 1.0 Examples: 2 Runnable: 0

([dir])

A tree seq on java.io.Files

Examples

by shockbob on 2011-08-21 . May have evaluation errors. ▶

;; first create a Java File object using the file function in ;; the clojure.java.io package and use that object to create a file-seq ;; then show the first 10 members of that seq (def f (clojure.java.io/file "c:\\clojure-1.2.0")) ;;=> #'user/f (def fs (file-seq f)) ;;=> #'user/fs (first fs) ;;=> #<File c:\clojure-1.2.0> (clojure.pprint/pprint (take 10 fs)) ;; (#<File c:\clojure-1.2.0> ;; #<File c:\clojure-1.2.0\.gitignore> ;; #<File c:\clojure-1.2.0\build.xml> ;; #<File c:\clojure-1.2.0\changes.txt> ;; #<File c:\clojure-1.2.0\cl.bat> ;; #<File c:\clojure-1.2.0\clojure.jar> ;; #<File c:\clojure-1.2.0\doc> ;; #<File c:\clojure-1.2.0\doc\clojure> ;; #<File c:\clojure-1.2.0\doc\clojure\pprint> ;; #<File c:\clojure-1.2.0\doc\clojure\pprint\CommonLispFormat.markdown>) ;;=>

by phreed on 2017-10-27 . May have evaluation errors. ▶

;; Fill an array with the file names in a directory. ;; Put them in an array. (mapv str (filter #(.isFile %) (file-seq (clojure.java.io/file ".")))) ;; Use the Path utilities to do glob filtering. (let [grammar-matcher (.getPathMatcher (java.nio.file.FileSystems/getDefault) "glob:*.{g4,md}")] (->> "." clojure.java.io/file file-seq (filter #(.isFile %)) (filter #(.matches grammar-matcher (.getFileName (.toPath %)))) (mapv #(.getAbsolutePath %)))) ;; At that point it may be better to just use the java.nio.file classes. ;; https://github.com/ajoberstar/ike.cljj has some ideas

Note by phreed

The file operations from java are https://docs.oracle.com/javase/8/docs/api/java/io/File.html

See also

• clojure.java.io/file (0)
• clojure.java.io/delete-file

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