Learnitweb

Author: Editorial Team

  • Linear and Non-Linear Data Structure

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    1. Introduction to Data Structures In computer science, a data structure is a way of organizing and storing data so that it can be accessed and modified efficiently. Data structures are fundamental for designing efficient algorithms and software systems. Data structures can be broadly categorized into: Understanding the difference between them helps in selecting the…

  • Hashing in Java

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    1. What is Hashing? Hashing is the process of converting an input of arbitrary length (like a string, file, or object) into a fixed-size numeric or alphanumeric value, known as the hash code or hash value. It’s a core concept in computer science and widely used in: 2. Key Characteristics of Hashing 3. Logic to…

  • What is SHA-256?

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    SHA-256 stands for Secure Hash Algorithm 256-bit. It is part of the SHA-2 family developed by the National Security Agency (NSA) and published by NIST (National Institute of Standards and Technology) in 2001. SHA-256: How SHA-256 Works – Conceptually SHA-256 takes an input (of any size) and processes it in the following steps: 1. Padding…

  • Custom HashMap in Java

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    This tutorial walks you through creating a custom HashMap in Java. You’ll learn how to implement: We’ll use: This version does not include initial capacity, load factor, or resizing to keep it simple and focused. Step 1: Define the MyHashMap Class and Entry Nodes Detailed Explanation: Step 2: Compute Hash (Array Index) Explanation: Step 3:…

  • Complex Data Type in Python

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    1. What is a Complex Data Type? In Python, a complex number is a built-in data type that is specifically used for mathematical and scientific computations. A complex number consists of a real part and an imaginary part, just like in algebra. Don’t be misled by the word “complex” — it refers to the mathematical…

  • Install Jenkins using the war file on Windows

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    1. Install Java 2. Download Jenkins WAR File 3. Run Jenkins WAR Open Command Prompt and navigate to the directory where you saved the .war file: Run Jenkins: This starts Jenkins on the default port 8080. 4. Get Admin Password After Jenkins starts, it will output something like this in the console: Alternatively, open the…

  • Filters and Interceptors in Spring Boot

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    Filters are a fundamental part of the Servlet API. They operate at the servlet level, meaning they intercept requests before they reach your Spring MVC dispatcher servlet (and thus, your Spring controllers) and responses after they leave it. Key Characteristics of Filters: When to Use Filters: Filters are excellent for tasks that need to be…

  • Redux Toolkit

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    In modern Redux development, managing state and actions can become cumbersome. Traditionally, we would define action types, action creators, and reducers manually. However, with Redux Toolkit, we can simplify this process by using the createSlice function, which allows us to define actions and reducers together in a more concise and manageable way. This tutorial covers…

  • React inline styling

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    In React, inline styling can be done using two main approaches: using a style object or a function that returns the style object. Let’s explore both. 1. Inline Style as an Object In this approach, you define the styles as a JavaScript object where the keys are the CSS properties in camelCase (rather than hyphenated)…

  • htmlFor in React

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    In React, htmlFor is used instead of the regular for attribute when defining labels in forms. This change is due to the fact that for is a reserved keyword in JavaScript, and using it in JSX would lead to syntax issues. Why htmlFor? In HTML, you typically associate a <label> with a form element like…