Add linked_list.

src/linked_list/LinkedList.js

@@ -0,0 +1,51 @@
+import { Node } from './Node';
+
+export class LinkedList {
+  constructor() {
+    this.head = null;
+  }
+
+  append(value) {
+    const newNode = new Node(value);
+
+    // If there is no head yet let's make new node a head.
+    if (!this.head) {
+      this.head = newNode;
+
+      return newNode;
+    }
+
+    // Rewind to last node.
+    let currentNode = this.head;
+    while (currentNode.nextNode !== null) {
+      currentNode = currentNode.nextNode;
+    }
+
+    // Attach new node to the end of linked list.
+    currentNode.nextNode = newNode;
+
+    return newNode;
+  }
+
+  prepend(value) {
+    this.head = new Node(value, this.head);
+  }
+
+  deleteWithValue(value) {
+
+  }
+
+  render() {
+    let currentNode = this.head;
+    let index = 0;
+
+    while(currentNode.nextNode !== null) {
+      console.log(`Node #${index} data: ${currentNode.value}`);
+      currentNode = currentNode.nextNode;
+      index++;
+    }
+
+    // Print the tail.
+    console.log(`Node #${index} data: ${currentNode.value}`);
+  }
+}

src/linked_list/Node.js

@@ -0,0 +1,6 @@
+export class Node {
+  constructor(value, nextNode = null) {
+    this.value = value;
+    this.nextNode = nextNode;
+  }
+}

src/linked_list/index.js

@@ -0,0 +1,11 @@
+import { LinkedList } from "./LinkedList";
+
+const linkedList = new LinkedList();
+
+linkedList.append(1);
+linkedList.append(2);
+linkedList.append(3);
+linkedList.prepend(4);
+linkedList.prepend(5);
+
+linkedList.render();