Initial data commit

Task/Sorting-algorithms-Shell-sort/Dart/sorting-algorithms-shell-sort.dart

@@ -0,0 +1,35 @@
+void main() {
+    List<int> a = shellSort([1100, 2, 56, 200, -52, 3, 99, 33, 177, -199]);
+    print('$a');
+}
+
+shellSort(List<int> array) {
+	int n = array.length;
+
+        // Start with a big gap, then reduce the gap
+        for (int gap = n~/2; gap > 0; gap ~/= 2)
+        {
+            // Do a gapped insertion sort for this gap size.
+            // The first gap elements a[0..gap-1] are already
+            // in gapped order keep adding one more element
+            // until the entire array is gap sorted
+            for (int i = gap; i < n; i += 1)
+            {
+                // add a[i] to the elements that have been gap
+                // sorted save a[i] in temp and make a hole at
+                // position i
+                int temp = array[i];
+
+                // shift earlier gap-sorted elements up until
+                // the correct location for a[i] is found
+                int j;
+                for (j = i; j >= gap && array[j - gap] > temp; j -= gap)
+                    array[j] = array[j - gap];
+
+                // put temp (the original a[i]) in its correct
+                // location
+                array[j] = temp;
+            }
+        }
+  return array;
+}