Sigmus · August 30, 2015 07:04 · Aug 30, 2015
diff --git a/xpto.md b/xpto.md
@@ -0,0 +1,29 @@
+  ---
+layout: post
+title: Next circular array item
+---
+
+A function that returns the next item in a given array. Starts over when the last item is reached.
+
+```javascript
+var next = nextCircularItem(['x', 'y', 'z']);
+
+next(); // x
+next(); // y
+next(); // z
+next(); // x
+        // etc
+
+function nextCircularItem(arr) {
+  var len = arr.length;
+  var current = -1;
+  return function() {
+    var next = current + 1;
+    current = next === len ? 0 : next;
+    return arr[current];
+  };
+}
+```
+
+
+