Just another update

Task/Sorting-algorithms-Sleep-sort/Dart/sorting-algorithms-sleep-sort.dart

@@ -0,0 +1,18 @@
+import 'dart:async';
+
+Future<List<int>> sleepsort(List<int> input) {
+  List<Future<int>> tasks = [];
+  List<int> result = [];
+  for (int i in input) {
+    tasks.add(new Future.delayed(new Duration(seconds: i), () {
+      result.add(i);
+    }));
+  }
+  return Future.wait(tasks).then((_) {
+    return result;
+  });
+}
+
+sleepsort.sleepsort([3, 1, 2]).then((List<int> sorted) {
+  print(sorted);
+});