diff --git a/data_structures/HashMap/Hashing.dart b/data_structures/HashMap/Hashing.dart
index 3aaeb852..ecc23d27 100644
--- a/data_structures/HashMap/Hashing.dart
+++ b/data_structures/HashMap/Hashing.dart
@@ -70,7 +70,8 @@ class HashMap {
   List<LinkedList> buckets;
 
   HashMap(int hsize) {
-    buckets = new List<LinkedList>(hsize);
+    buckets = []..length = hsize;
+
     for (int i = 0; i < hsize; i++) {
       buckets[i] = new LinkedList();
     }
diff --git a/data_structures/Queue/Circular_Queue.dart b/data_structures/Queue/Circular_Queue.dart
index 6d870555..e3950c62 100644
--- a/data_structures/Queue/Circular_Queue.dart
+++ b/data_structures/Queue/Circular_Queue.dart
@@ -6,7 +6,7 @@ const int MAX_SIZE = 10;
 
 class CircularQueue<T> {
   int start = -1, end = -1;
-  List<T> queue = new List<T>(MAX_SIZE);
+  List<T> queue = []..length = MAX_SIZE;
 
   // insert elements into the queue
   void enque(T element) {
diff --git a/data_structures/Queue/List_Queue.dart b/data_structures/Queue/List_Queue.dart
index 6fb61bfb..b78d4cd7 100644
--- a/data_structures/Queue/List_Queue.dart
+++ b/data_structures/Queue/List_Queue.dart
@@ -5,7 +5,7 @@ const int MAX_SIZE = 10;
 
 class ListQueue<T> {
   int count = 0;
-  List<T> queue = new List<T>(MAX_SIZE);
+  List<T> queue = []..length = MAX_SIZE;
 
   //Checks if the queue has elements (not empty)
   bool hasElements() {
diff --git a/data_structures/linked_list/cycle_in_linked_list.dart b/data_structures/linked_list/cycle_in_linked_list.dart
index 5582046c..ca29efa1 100644
--- a/data_structures/linked_list/cycle_in_linked_list.dart
+++ b/data_structures/linked_list/cycle_in_linked_list.dart
@@ -79,7 +79,7 @@ Node findCyclicNode(Node headNode) {
 
 void main() {
   LinkedList linkedList = LinkedList();
-  List<Node> allNodes = List();
+  List<Node> allNodes = [];
   for (var i = 0; i <= 10; i++) {
     Node newNode = createNode(i);
     linkedList.insert(newNode);
diff --git a/graphs/depth_first_search.dart b/graphs/depth_first_search.dart
index c60ca4fc..ac85cffd 100644
--- a/graphs/depth_first_search.dart
+++ b/graphs/depth_first_search.dart
@@ -14,7 +14,7 @@ class Graph {
     /// each node will have a list as value which stores
     /// the nodes to which it is connected to
     for (int i = 0; i < this.nodes.length; i++) {
-      this.graph[nodes[i]] = List();
+      this.graph[nodes[i]] = [];
     }
   }
 
@@ -32,7 +32,7 @@ class Graph {
 
   void addNodes(int newNode) {
     this.nodes.add(newNode);
-    this.graph[newNode] = List();
+    this.graph[newNode] = [];
   }
 
   void addEdges(int start, int end) {
@@ -59,7 +59,7 @@ List<int> depthFirstSearch(Graph graph, int numberOfNodes, int startNode) {
   List<bool> visitedNodes =
       new List<bool>.generate(numberOfNodes, (index) => false);
 
-  List<int> answer = List();
+  List<int> answer = [];
   depthFirstSearchHelper(graph.graph, visitedNodes, startNode, answer);
   return answer;
 }
diff --git a/other/N_bonacci.dart b/other/N_bonacci.dart
index 217417a7..545db206 100644
--- a/other/N_bonacci.dart
+++ b/other/N_bonacci.dart
@@ -1,7 +1,7 @@
 import 'package:test/test.dart';
 
 List N_bonacci(int n, int m) {
-  List v = new List(m);
+  List v = []..length = m;
   var i;
   for (i = 0; i < m; i++) {
     v[i] = 0;
diff --git a/sort/merge_sort.dart b/sort/merge_sort.dart
index 9da909e3..f7bdfa3e 100644
--- a/sort/merge_sort.dart
+++ b/sort/merge_sort.dart
@@ -4,8 +4,7 @@ void merge(List list, int lIndex, int mIndex, int rIndex) {
   int lSize = mIndex - lIndex + 1;
   int rSize = rIndex - mIndex;
 
-  List lList = new List(lSize);
-  List rList = new List(rSize);
+  List lList = []..length = lSize, rList = []..length = rSize;
 
   for (int i = 0; i < lSize; i++) lList[i] = list[lIndex + i];
   for (int j = 0; j < rSize; j++) rList[j] = list[mIndex + j + 1];