add documentation

1 files changed, 11 insertions, 3 deletions

diff --git a/src/list.rs b/src/list.rs
index 74790a1..d5d5524 100755
--- a/src/list.rs
+++ b/src/list.rs
@@ -1,20 +1,28 @@
 #[derive(Debug)]
 pub struct ContentList<T> {
     pub list: Vec<T>,
-    pub index: usize
+    pub index: usize,
 }
 
 impl<T> ContentList<T> {
     pub fn new() -> Self {
         ContentList {
             list: Vec::new(),
-            index: 0
+            index: 0,
         }
     }
 
     // Go to next item in list
     pub fn next(&mut self) {
-        self.index += 1;
+        // if self.index < self.list.len() - 1 {
+        //     self.index += 1;
+        // }
+
+        if self.index == self.list.len() - 1 {
+            self.index = 0;
+        } else {
+            self.index += 1;
+        }
     }
 
     /// Go to previous item in list