added function

Author: mauricechouam

Height Checker/code.js

@@ -0,0 +1,17 @@
+/*
+ * @param {number[]} heights
+ * @return {number}
+ */
+var heightChecker = function(heights) {
+    let ordered = heights.slice().sort(function(a, b) {
+    return a-b;
+  })
+  
+  let count = 0;
+  for (let i = 0; i < heights.length; i++) {
+    if (ordered[i] !== heights[i]) {
+      count += 1
+    };
+  };
+    return count
+};