From 606fd2dc1ea8610ec6fe2b20e607468b9f318579 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Dominik=20Pant=C5=AF=C4=8Dek?=
 <dominik.pantucek@trustica.cz>
Date: Mon, 20 Mar 2023 20:34:55 +0100
Subject: [PATCH] Document utils.

---
 README.md | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/README.md b/README.md
index d568f96..cb0a093 100644
--- a/README.md
+++ b/README.md
@@ -93,3 +93,16 @@ Support Modules
 ### Testing
 
 ### Utils
+
+To ensure there are no external dependencies (including chicken eggs),
+this module re-implements any basic procedures which are required for
+any algorithms used.
+
+#### Filter
+
+    (filter pred? lst)
+
+* ```pred?``` - procedure accepting any value and returning #t or #f
+* ```lst``` - list to be filtered
+
+Returns a list containing only elements matching given ```pred?``` predicate.