1630332025

This is going to be a different article as my assumption after testing some on my machine turned out to be slightly wrong.

TL;DR

Use ArrayList in most standard cases where you simply add to the list and later on iterate over it. It will save you both time and memory.
Note that this article does not discuss the complexities of some of their operations where we know one or the other would perform substantially better .

1628758468

## JavaScript Algorithms and Data Structures: Doubly Linked List

In computer science, a doubly linked list is a linked data structure that consists of a set of sequentially linked records called nodes. Each node contains two fields, called links, that are references to the previous and to the next node in the sequence of nodes. The beginning and ending nodes' previous and next links, respectively, point to some kind of terminator, typically a sentinel node or null, to facilitate the traversal of the list. If there is only one sentinel node, then the list is circularly linked via the sentinel node. It can be conceptualized as two singly linked lists formed from the same data items, but in opposite sequential orders.

The two node links allow traversal of the list in either direction. While adding or removing a node in a doubly linked list requires changing more links than the same operations on a singly linked list, the operations are simpler and potentially more efficient (for nodes other than first nodes) because there is no need to keep track of the previous node during traversal or no need to traverse the list to find the previous node, so that its link can be modified.

## Pseudocode for Basic Operations

### Insert

``````Add(value)
Pre: value is the value to add to the list
Post: value has been placed at the tail of the list
n ← node(value)
tail ← n
else
n.previous ← tail
tail.next ← n
tail ← n
end if
``````

### Delete

``````Remove(head, value)
value is the value to remove from the list
Post: value is removed from the list, true; otherwise false
return false
end if
tail ← ø
else
end if
return true
end if
while n != ø and value !== n.value
n ← n.next
end while
if n = tail
tail ← tail.previous
tail.next ← ø
return true
else if n != ø
n.previous.next ← n.next
n.next.previous ← n.previous
return true
end if
return false
end Remove
``````

### Reverse Traversal

``````ReverseTraversal(tail)
Pre: tail is the node of the list to traverse
Post: the list has been traversed in reverse order
n ← tail
while n != ø
yield n.value
n ← n.previous
end while
end Reverse Traversal
``````

O(n)

## References

Read this in other languages: Русский, 简体中文, 日本語, Português, 한국어, Español,

The Original Article can be found on https://github.com

1628754143

## JavaScript Algorithms and Data Structures: Linked List

In computer science, a linked list is a linear collection of data elements, in which linear order is not given by their physical placement in memory. Instead, each element points to the next. It is a data structure consisting of a group of nodes which together represent a sequence. Under the simplest form, each node is composed of data and a reference (in other words, a link) to the next node in the sequence. This structure allows for efficient insertion or removal of elements from any position in the sequence during iteration. More complex variants add additional links, allowing efficient insertion or removal from arbitrary element references. A drawback of linked lists is that access time is linear (and difficult to pipeline). Faster access, such as random access, is not feasible. Arrays have better cache locality as compared to linked lists.

## Pseudocode for Basic Operations

### Insert

``````Add(value)
Pre: value is the value to add to the list
Post: value has been placed at the tail of the list
n ← node(value)
tail ← n
else
tail.next ← n
tail ← n
end if
``````
``````Prepend(value)
Pre: value is the value to add to the list
Post: value has been placed at the head of the list
n ← node(value)
if tail = ø
tail ← n
end
end Prepend
``````

### Search

``````Contains(head, value)
value is the value to search for
Post: the item is either in the linked list, true; otherwise false
while n != ø and n.value != value
n ← n.next
end while
if n = ø
return false
end if
return true
end Contains
``````

### Delete

``````Remove(head, value)
value is the value to remove from the list
Post: value is removed from the list, true, otherwise false
return false
end if
if n.value = value
tail ← ø
else
end if
return true
end if
while n.next != ø and n.next.value != value
n ← n.next
end while
if n.next != ø
if n.next = tail
tail ← n
tail.next = null
end if
n.next ← n.next.next
return true
end if
return false
end Remove
``````

### Traverse

``````Traverse(head)
Post: the items in the list have been traversed
while n != ø
yield n.value
n ← n.next
end while
end Traverse
``````

### Traverse in Reverse

``````ReverseTraversal(head, tail)
Pre: head and tail belong to the same list
Post: the items in the list have been traversed in reverse order
if tail != ø
curr ← tail
while prev.next != curr
prev ← prev.next
end while
yield curr.value
curr ← prev
end while
yield curr.value
end if
end ReverseTraversal
``````

O(n)

## References

Read this in other languages: 简体中文, Русский, 日本語, Português, 한국어, Español,

The Original Article can be found on https://github.com

1627314300

Definition : A linked list is a linear data structure, in which the elements are not stored at contiguous memory locations. The elements in a linked list are linked using pointers(entity that point to the next element)
In simple words, a linked list consists of nodes where each node contains a data field and a reference(link) to the next node in the list.

Some important terms in Linked List DS -

1. Node/Link/Element/Object - Each node in the linked list consists of 2 parts -
a) data
b) link to the next node
2. Next - This points to the next node/element in the linked list (since they are not stored in a contiguous memory locations)

Following are the standard Linked List Operations -

2. Append a new node (to the end) of a list
3. Prepend a new node (to the beginning) of the list
4. Inserting a new node to a specific position on the list
5. Deleting a node from the list

1. Linked Lists can be used to implement Stacks , Queues.
2. Linked Lists can also be used to implement Graphs. (Adjacency list representation of Graph).
3. Implementing Hash Tables :- Each Bucket of the hash table can itself be a linked list. (Open chain hashing).
4. Undo functionality in Photoshop or Word . Linked list of states

1626608760

------- What Are Data Structures and Why Are They Important?
https://youtu.be/siEWYf1_vwE
------- JavaScript Constructor Function | JavaScript ‘this’ keyword
https://youtu.be/JwcoZIuofis
------- Understanding Prototype Object with Constructor Function
https://youtu.be/Wc9aY7qclbw
------- What is Linked List | Linked List and Node Constructor Function
https://youtu.be/503K2Gf_uJg
https://youtu.be/3RACne-ssWw
https://youtu.be/bbrtKT0eabk
------- How to remove node from Linked List | Removing Node from Linked List Head and Tail
https://youtu.be/pmnlWFyrRzI

------- Complete Playlist on Data Structures with JavaScript

Other Interesting Videos and Video series on development:
------- Fullstack Web Developer Interview Preparation

------- Best Resource for Complete Guide on Flutter Development

------- React Hooks Series

------- Fundamentals of GraphQL in Hindi

Github: https://github.com/AnkitDroidGit
Instagram: https://www.instagram.com/Code.With.AK
Telegram: https://t.me/TechTalksWithAK

0:00 - Intro
6:00 - Remove Tail of Linked List
10:50 - Outro

#DataStructures #JavaScript #LinkedList #AnkitKumar #TechTalksWithAK #TechTalks

1626601260

We are going to want to be able to

• remove the head node to retrieve its data and
• remove the tail node to retrieve its data.

We are also going to want to be able to search our linked list to see if a certain piece of data that we are looking for actually resides in it.

------- What Are Data Structures and Why Are They Important?
https://youtu.be/siEWYf1_vwE
------- JavaScript Constructor Function | JavaScript ‘this’ keyword
https://youtu.be/JwcoZIuofis
------- Understanding Prototype Object with Constructor Function
https://youtu.be/Wc9aY7qclbw
------- What is Linked List | Linked List and Node Constructor Function
https://youtu.be/503K2Gf_uJg
https://youtu.be/3RACne-ssWw
https://youtu.be/bbrtKT0eabk
------- How to remove node from Linked List | Removing Node from Linked List Head and Tail
https://youtu.be/pmnlWFyrRzI

------- Complete Playlist on Data Structures with JavaScript

Other Interesting Videos and Video series on development:
------- Fullstack Web Developer Interview Preparation

------- Best Resource for Complete Guide on Flutter Development

------- React Hooks Series

------- Fundamentals of GraphQL in Hindi

Github: https://github.com/AnkitDroidGit
Instagram: https://www.instagram.com/Code.With.AK
Telegram: https://t.me/TechTalksWithAK

#LinkedList #DataStructures #JavaScript #CodeWithAK #TechTalksWithAK #AK #Ankit #Kumar #AnkitKumar

1626594300

We are going to want to be able to

• remove the head node to retrieve its data and
• remove the tail node to retrieve its data.

We are also going to want to be able to search our linked list to see if a certain piece of data that we are looking for actually resides in it.

------- What Are Data Structures and Why Are They Important?
https://youtu.be/siEWYf1_vwE
------- JavaScript Constructor Function | JavaScript ‘this’ keyword
https://youtu.be/JwcoZIuofis
------- Understanding Prototype Object with Constructor Function
https://youtu.be/Wc9aY7qclbw
------- What is Linked List | Linked List and Node Constructor Function
https://youtu.be/503K2Gf_uJg
https://youtu.be/3RACne-ssWw
https://youtu.be/bbrtKT0eabk
------- How to remove node from Linked List | Removing Node from Linked List Head and Tail
https://youtu.be/pmnlWFyrRzI

------- Complete Playlist on Data Structures with JavaScript

Other Interesting Videos and Video series on development:
------- Fullstack Web Developer Interview Preparation

------- Best Resource for Complete Guide on Flutter Development

------- React Hooks Series

------- Fundamentals of GraphQL in Hindi

Github: https://github.com/AnkitDroidGit
Instagram: https://www.instagram.com/Code.With.AK
Telegram: https://t.me/TechTalksWithAK

#LinkedList #DataStructures #JavaScript #CodeWithAK #TechTalksWithAK #AK #Ankit #Kumar #AnkitKumar

0:00 - Introduction
16:00 - Outroduction

1626586620

## What is Linked List | Linked List and Node Constructor Function

What is Linked List | Linked List and Node Constructor Function | Data Structures with JavaScript

Linkedin List a list of elements called nodes that are connected together or linked together in a single file line.
In a singly linked list, each node only has reference to the node after it or the next node.
In a doubly-linked list, each node has reference to the next node, but it also has reference to the one before it as well or the previous node.

------- What Are Data Structures and Why Are They Important?
https://youtu.be/siEWYf1_vwE
------- JavaScript Constructor Function | JavaScript ‘this’ keyword
https://youtu.be/JwcoZIuofis
------- Understanding Prototype Object with Constructor Function
https://youtu.be/Wc9aY7qclbw
------- What is Linked List | Linked List and Node Constructor Function
https://youtu.be/503K2Gf_uJg
https://youtu.be/3RACne-ssWw
https://youtu.be/bbrtKT0eabk
------- How to remove node from Linked List | Removing Node from Linked List Head and Tail
https://youtu.be/pmnlWFyrRzI

------- Complete Playlist on Data Structures with JavaScript

Other Interesting Videos and Video series on development:
------- Fullstack Web Developer Interview Preparation

------- Best Resource for Complete Guide on Flutter Development

------- React Hooks Series

------- Fundamentals of GraphQL in Hindi

Github: https://github.com/AnkitDroidGit
Instagram: https://www.instagram.com/Code.With.AK
Telegram: https://t.me/TechTalksWithAK

0:00 - Intro
0:21 - What is Linked List?
1:45 - Operation on Linked List
2:45 - Data Representation of Linked List
9:55 - Outro

1623061440

## LinkedList Introduction | Java Collections Framework [Video]

#### This incredibly in-depth guide will show you everything you need to know about using LinkedList within Java Collections Framework (JCF).

In the video below, we take a closer look at the What is LinkedList? | LinkedList Introduction and Sample Programs | Java Collections Framework. Let’s get started!

1606131456

## Delete a Node, Is Same Tree, Move Zeroes

1600508160

LinkedList in Java is a linear data structure (like a  stack), but instead of storage of data elements contiguous, each item of LinkedList is stored separately with the help of pointer. The data structure is a fast and efficient way to store and organize data. Each item is known as a node, and the node consists of two parts-data part and the pointer part. Every pointer points to the address of the next node. The last node of the LinkedList points to NULL.

In Java, the LinkedList class implements the List interface, and this class uses a doubly linked list to store the data elements.

See the following figure.

Unlike a regular linked list, the doubly linked list consists of there part in each node- previous pointerdata part, and next pointer.

1600150620

## Java List Interface Example | List Interface In Java Tutorial

Java List Interface extends Collection interface. The list interface is used to store and manipulate items. Insertion and deletion are positional based, and the list can have duplicate items in it. In general, it is used to store lists of objects and preserves the order. List Interface is implemented by  ArrayList,  LinkedList,  Vector, and  Stack classes.

### Java List Interface

The List interface places additional stipulations, beyond those specified in a Collection interface, on the contracts of an iterator, add, remove, equals, and hashCode methods.

Declarations for other inherited methods are also included here for convenience. The ordered collection which is also known as a sequence.

The user of this  interface has precise control over where in the list, each element is inserted. The user can access items by their integer index (position in the list), and search for elements in the list.

Unlike sets, lists typically allow duplicate elements. More formally, lists usually allow pairs of elements e1 and e2 such that e1.equals(e2), and they usually allow multiple null items if they allow null items at all.

It is not that inconceivable that someone might wish to implement the list that prohibits duplicates, by throwing the runtime exceptions when a user attempts to insert them, but we expect this usage to be rare.