Robert Smith avatar Robert Smith committed 5433f1a

Add FILE-LINES, a generator for the lines of a file.

Comments (0)

Files changed (1)

    (lambda ()
      (next-if predicate gen))))
 
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; Files ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+(defun file-lines (filename)
+  "Create a new generator for the lines of a file."
+  (generator
+   (let ((stream (open filename :direction :input
+                                :if-does-not-exist :error)))
+     (lambda ()
+       (let ((line (read-line stream nil nil)))
+         (or line
+             (progn
+               (close stream)
+               (exhausted))))))))
 
 ;;;;;;;;;;;;;;;;;;;;;; Miscellaneous Generators ;;;;;;;;;;;;;;;;;;;;;;
 
Tip: Filter by directory path e.g. /media app.js to search for public/media/app.js.
Tip: Use camelCasing e.g. ProjME to search for ProjectModifiedEvent.java.
Tip: Filter by extension type e.g. /repo .js to search for all .js files in the /repo directory.
Tip: Separate your search with spaces e.g. /ssh pom.xml to search for src/ssh/pom.xml.
Tip: Use ↑ and ↓ arrow keys to navigate and return to view the file.
Tip: You can also navigate files with Ctrl+j (next) and Ctrl+k (previous) and view the file with Ctrl+o.
Tip: You can also navigate files with Alt+j (next) and Alt+k (previous) and view the file with Alt+o.