Add random-alnum function

emacs/init.org

@@ -451,6 +451,16 @@ Convenience macro to run some code in a particular default-directory:
        ,@body))
 #+END_SRC
 
+#+BEGIN_SRC emacs-lisp
+  (defun random-alnum (&optional n)
+    (let* ((n-chars (or n 1))
+	   (alnum "abcdefghijklmnopqrstuvwxyz0123456789")
+	   (result ""))
+      (dotimes (_ n-chars result)
+	(let ((i (% (abs (random)) (length alnum))))
+	  (setq result
+		(concat result (substring alnum i (1+ i))))))))
+#+END_SRC
 ** Persisting variables between session
 The idea behind this is pretty simple - variables get persisted in ~/.emacs.d/<persisted-vars-file> as a plist of (variable-name variable-value).