20

Ajit24 · Ajit24 · commit bab045c5560c · 2022-09-12T21:46:53.000+05:30
diff --git a/20.js b/20.js
@@ -0,0 +1,25 @@
+// Step By Step
+function SecondGreatLow (arr) {
+    // Use the sort function and pass in a callback to sort from smallest to largest
+    // If you haven't encountered function expressions/callbacks before, https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/sort gives a good explanation of how this method works.
+    arr = arr.sort(function (a, b) { return a - b; });
+  
+    // Loop through each item in the array and check if the adjacent array item is the same.
+    for (var i = arr.length - 1; i > 0; i--) {
+      if (arr[i] === arr[i - 1]) {
+        // If it is, we use the .splice method to remove it.
+        arr.splice(i, 1);
+      }
+    }
+  
+    if (arr.length > 2) {
+      // If our array is longer than two items, we return the 2nd and 2nd to last item in the array.
+      return arr[1] + ' ' + arr[arr.length - 2];
+    } else if (arr.length === 2) {
+      // If our array is exactly two items long, we return the 2nd and the first item
+      return arr[1] + ' ' + arr[0];
+    } else {
+      // If our array is only one item, we return the only element twice.
+      return arr[0] + ' ' + arr[0];
+    }
+  }
