First Commit

js/util.js

@@ -0,0 +1,17 @@
+function shuffle(array) {
+  let currentIndex = array.length,  randomIndex;
+
+  // While there remain elements to shuffle...
+  while (currentIndex != 0) {
+
+    // Pick a remaining element...
+    randomIndex = Math.floor(Math.random() * currentIndex);
+    currentIndex--;
+
+    // And swap it with the current element.
+    [array[currentIndex], array[randomIndex]] = [
+      array[randomIndex], array[currentIndex]];
+  }
+
+  return array;
+}