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link list in js

Amjad Saeed answered on October 7, 2023 Popularity 8/10 Helpfulness 2/10

answer link list in js

link list in js

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Certainly! Let's consider a real-life scenario where a linked list can be applied: a music playlist.

Real-Life Example: Music Playlist

Imagine you want to create a simple music playlist using a linked list. Each song in the playlist is represented as a node in the linked list. The linked list will keep track of the order of songs and allow you to perform operations like adding songs, removing songs, and playing songs in the order they were added.

Here's a JavaScript implementation of a music playlist using a linked list:

class Song {
  constructor(title, artist) {
    this.title = title;
    this.artist = artist;
    this.next = null;
  }
}

class Playlist {
  constructor() {
    this.head = null;
    this.tail = null;
  }

  // Add a song to the end of the playlist
  addSong(title, artist) {
    const newSong = new Song(title, artist);
    if (!this.head) {
      this.head = newSong;
      this.tail = newSong;
    } else {
      this.tail.next = newSong;
      this.tail = newSong;
    }
  }

  // Remove a song from the playlist
  removeSong(title) {
    if (!this.head) return;

    // If the song to remove is the first song
    if (this.head.title === title) {
      this.head = this.head.next;
      if (!this.head) {
        this.tail = null; // Update the tail if the playlist is now empty
      }
      return;
    }

    let current = this.head;
    while (current.next) {
      if (current.next.title === title) {
        current.next = current.next.next;
        if (!current.next) {
          this.tail = current; // Update the tail if the last song is removed
        }
        return;
      }
      current = current.next;
    }
  }

  // Display the playlist
  displayPlaylist() {
    let current = this.head;
    while (current) {
      console.log(`Title: ${current.title}, Artist: ${current.artist}`);
      current = current.next;
    }
  }
}

// Usage
const myPlaylist = new Playlist();
myPlaylist.addSong("Song 1", "Artist A");
myPlaylist.addSong("Song 2", "Artist B");
myPlaylist.addSong("Song 3", "Artist C");

console.log("Initial Playlist:");
myPlaylist.displayPlaylist();

myPlaylist.removeSong("Song 2");

console.log("Updated Playlist after removing Song 2:");
myPlaylist.displayPlaylist();


In this example, the Song class represents individual songs with a title, artist, and a reference to the next song in the playlist. The Playlist class manages the linked list of songs, allowing you to add, remove, and display songs in the playlist.

This illustrates how linked lists can be used to manage dynamic collections of data, such as a playlist of songs.

Popularity 8/10 Helpfulness 2/10 Language javascript

Source: Grepper

Tags: javascript list

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Contributed on Oct 07 2023

Amjad Saeed

0 Answers Avg Quality 2/10

link list in js

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