Added PancakeSort and the other minor changes

Sorts/src/sort/HeapSort.java

@@ -10,7 +10,7 @@ import static sort.SortUtils.*;
  * Heap Sort Algorithm
  * Implements MinHeap
  *
- * @author Unknown
+ * @author Podshivalov Nikita (https://github.com/nikitap492)
  *
  */
 public class HeapSort implements SortAlgorithm {

Sorts/src/sort/PancakeSort.java

@@ -0,0 +1,47 @@
+package sort;
+
+import static sort.SortUtils.*;
+
+/**
+ * Implementation of gnome sort
+ *
+ * @author Podshivalov Nikita (https://github.com/nikitap492)
+ * @since 2018-04-10
+ *
+ **/
+public class PancakeSort implements SortAlgorithm {
+
+
+    @Override
+    public <T extends Comparable<T>> T[] sort(T[] array){
+        int size = array.length;
+
+        for (int i = 0; i < size; i++) {
+            T max = array[0];
+            int index = 0;
+            for (int j = 0; j < size - i; j++) {
+                if ( less(max, array[j]) ) {
+                    max = array[j];
+                    index = j;
+                }
+            }
+            flip(array, index, array.length - 1 - i);
+        }
+        return array;
+    }
+
+
+    public static void main(String[] args) {
+
+        Integer[] arr = {10, 9, 8, 7, 6, 15, 14, 7, 4, 3, 8, 6, 3, 1 ,2, -2, -5, -8, -3, -1, 13, 12, 11, 5, 4, 3, 2, 1};
+        PancakeSort pancakeSort = new PancakeSort();
+        System.out.println("After sorting:");
+        pancakeSort.sort(arr);
+        print(arr);
+    }
+
+
+
+
+
+}

Sorts/src/sort/SortUtils.java

@@ -56,6 +56,20 @@ final class SortUtils {
      * @param toPrint - the array  which should be printed
      */
     static void print(Object[] toPrint){
-       print(Arrays.asList(toPrint));
+        System.out.println(Arrays.toString(toPrint));
+    }
+
+
+
+    /**
+     * Swaps all position from {@param left} to @{@param right} for {@param array}
+     * @param array is an array
+     * @param left is a left flip border of the array
+     * @param right is a right flip border of the array
+     */
+    static <T extends Comparable<T>> void flip(T[] array, int left, int right) {
+        while (left <= right) {
+            swap(array, left++ , right--);
+        }
     }
 }