diff --git a/src/SUMMARY.md b/src/SUMMARY.md
index ffa868d..9921424 100644
--- a/src/SUMMARY.md
+++ b/src/SUMMARY.md
@@ -10,6 +10,7 @@
             - [babel and babel-preset-stage-2](./dev/web/front/babel-preset-stage-2.md)
         - [js](./dev/web/javascript/main.md)
             - [ES6 features](./dev/web/javascript/es6.md)
+    - [Regex](./dev/regex/main.md)
     - [Tools](./dev/tools/main.md)
         - [Git](./dev/tools/git.md)
         - [SVN](./dev/tools/svn.md)
diff --git a/src/dev/regex/main.md b/src/dev/regex/main.md
new file mode 100644
index 0000000..26c1fc6
--- /dev/null
+++ b/src/dev/regex/main.md
@@ -0,0 +1,13 @@
+# Regex
+
+## Non capturing group
+
+- 8 cats
+- 9 dogs
+- 10 cows
+
+Match and capture **ONLY** the number of cats and dogs using ?:, for _non capturing_ groups
+
+```txt
+(\d+) (?:cats|dogs)
+```
\ No newline at end of file