selection sort[DART] added

SORT[DART]/selection_sort_dart.dart

@@ -0,0 +1,28 @@
+void selectionSort(List list) {
+  if (list == null || list.length == 0) return;
+  int n = list.length;
+  int j, i;
+  for (i = 0; i < n; i++) {
+    int min = list[i];
+    int temp_pos = i;
+    for (j = i + 1; j < n; j++) {
+      if (min > list[j]) {
+        min = list[j];
+        temp_pos = j;
+      }
+    }
+        swap(list, i, temp_pos);
+  }
+}
+
+void swap(List list, int i, int j) {
+  int temp = list[i];
+  list[i] = list[j];
+  list[j] = temp;
+}
+
+void main() {
+  List l = [14, 2, 17, 1, 9];
+  selectionSort(l);
+  print(l);
+}