Learnitweb

Author: Editorial Team

  • How to sort an array with million records?

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    1. Understanding the Problem You have: Since this array easily fits in memory (a million integers take only ~4 MB), you don’t need any external or distributed sorting approach.All sorting can be done in-memory — which allows for O(n log n) performance and sub-second execution on modern CPUs. 2. Java Sorting Algorithms Overview Java provides…

  • Dual-Pivot Quicksort

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    1. Introduction Quicksort is one of the fastest and most widely used sorting algorithms due to its efficiency and in-place sorting behavior. Traditionally, Quicksort uses one pivot to partition an array into two parts: However, in Dual-Pivot Quicksort, the idea is extended to use two pivots instead of one. This allows partitioning the array into…

  • Understanding Cloud Computing

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    Introduction Cloud computing has revolutionized how individuals and businesses use technology by enabling on-demand access to computing resources through the internet. This tutorial provides a detailed exploration of what cloud computing is, how it evolved into modern cloud architecture, and the key service models that power today’s applications — Infrastructure as a Service (IaaS), Platform…

  • Practical implementation TDIDF

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    1. Introduction In this tutorial, we will walk step by step through how to implement TF-IDF practically using Python. 2. Installing Required Libraries We will use NLTK for preprocessing and Scikit-learn for TF-IDF vectorization. 3. Step-by-Step Implementation in Python Step 1: Import Required Libraries Step 2: Prepare a Sample Corpus Let’s define a small corpus…

  • TF-IDF (Term Frequency–Inverse Document Frequency) intuition

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    Introduction When working with textual data, one of the fundamental tasks is to convert text into numerical features that a machine learning model can understand. Simple word counts may capture the frequency of words, but they fail to represent the importance of a word in relation to the entire corpus. This is where TF-IDF (Term…

  • Difference Between @Component, @Service, and @Repository

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    1. Introduction In the Spring Framework, all three annotations — @Component, @Service, and @Repository — are used to declare classes as Spring-managed beans. This means: However, each annotation serves a different semantic role within a typical layered architecture.Even though all of them ultimately act as components, they differ in meaning, intent, and sometimes behavior. 2.…

  • Role of CommandLineRunner & ApplicationRunner in Spring Boot

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    1. Introduction When a Spring Boot application starts, it goes through several internal phases: Sometimes, you may want to run specific code immediately after the Spring Boot application has started — for example: To handle such cases, Spring Boot provides two functional interfaces: Both are part of the org.springframework.boot package and are commonly used to…

  • BeanFactory vs ApplicationContext in Spring Framework

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    1. Introduction In the Spring Framework, one of the core ideas is Inversion of Control (IoC), also known as Dependency Injection (DI). It means that instead of manually creating and managing object dependencies in your code, Spring handles it for you through a container. The container is responsible for: Spring provides two main IoC containers…

  • Multi-Level Sorting using Comparator in Java

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    1. Introduction Sorting is one of the most common operations in programming, especially when working with collections of objects such as lists of employees, products, or students. In Java, sorting objects based on multiple fields (or multi-level sorting) is often required when one attribute alone is not sufficient to determine order. For example: This kind…

  • Java Memory Model (JMM)

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    1. Introduction Modern Java programs frequently use multithreading to improve performance, responsiveness, and scalability. However, with multiple threads accessing shared data, problems like inconsistent views of memory, race conditions, and visibility issues can arise. To manage these challenges, Java introduced the Java Memory Model (JMM) as part of the Java Language Specification (JLS) in Java…