New util function

emacs/init.org

@@ -221,6 +221,15 @@ The same but for seconds:
      (message (format-time-string "%F %r" seconds)))
 #+END_SRC
 
+Checking if a buffer contains a string:
+#+BEGIN_SRC emacs-lisp
+  (defun buffer-contains-substring (string)
+    (save-excursion
+      (save-match-data
+	(goto-char (point-min))
+	(search-forward string nil t))))
+#+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).