HashSet

A HashSet is a collection that stores unique elements and uses hashing for fast lookups, insertions and deletions. It does not maintain element order and allows null values (in some languages). Ideal for removing duplicates and quick membership tests, HashSet offers average O(1) time complexity for basic operations.

Popular Topics

Git

Git is an open-source distributed version control system.

Git Commit

git branch

git branch is a command used to manage branches

Architecture

architecture

git pull

git pull is a command used to fetching changes form remote repo

Language-Concepts

This tag is used to understand a basic part of the language.

git commands

List of all git commands

GitHub

GitHub is a web-based hosting service for software development projects that use Git for version control.

Java

Java is a high-level object-oriented programming language. it's firstly released by Sun Microsystems in 1995. Use this tag when you're having queries using or understanding the language. This tag is also applicable to Java libraries and frameworks.

HashMap

A HashMap is a data structure that stores key-value pairs using hashing for fast access, insertion and deletion. Keys are unique and each maps to exactly one value. It offers average O(1) time complexity for basic operations and is widely used for efficient lookups, caching and data mapping in applications.

Most Popular Tools

Explore our top online tools including a blank page for notes, a QR code generator, word counter and collaborative editor. These free, easy-to-use utilities help you write, analyze, share and organize content faster. Perfect for developers, creators and students to streamline everyday digital tasks efficiently.

Blank Page

Create a blank canvas for your ideas, notes or sketches. Use this tool for rough work and jotting down your thoughts

QR Code Generator

A QR Code Generator is a tool that instantly converts text, URLs or other data into a scannable QR code. Users can create custom QR codes for websites, contact info or messages. It's commonly used for quick access, sharing and printing without needing a backend or complex setup.

Word Counter

Perform various string operations like counting characters, words or letters.

Collaborative Editor

Collab Editor is a powerful, free-to-use online platform that lets you collaborate in real-time. Whether you re working on documents, brainstorming idea, or discussing projects etc