Internal Regex example added.

vala/regexp/ex.vala

@@ -0,0 +1,20 @@
+bool is_valid_email(string email) {
+	var status = true;
+	stdout.puts(@"$email is ");
+	if(! /^[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}$/i.match(email)) {
+		stdout.puts("not ");
+		status = false;
+	}
+	stdout.puts("valid email address.\n");
+	return status;
+}
+
+
+void main () {
+	is_valid_email("backbone@backbone.ws");
+	is_valid_email("abrakadabra@@@lksdfj");
+
+	var r = /(_name_|_NAME_|_Name_)/;
+	var s = r.replace("My name is _NAME_", -1, 0, "Kolan");
+	stdout.puts(@"$s\n");
+}