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Javacodegeeks

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@Context Complex Source Mappings Example

The @Context annotation from MapStruct allows injecting context objects into mapping methods for complex source mappings.
Examples include using @AfterMapping, @BeforeMapping, @ObjectFactory, Expression, and QualifiedByName to handle complex mappings.
Mapper interfaces and abstract classes are created to demonstrate the usage of @Context annotation for mapping logic.
Different methods like map, setLookupValue, and splitFullName are used with @Context for mapping operations.
Interface and abstract class differentiation is based on complexity of mapping logic and dependency injection needs.
Generated implementation classes like MapperWithExpressionImpl are created to handle the actual mapping operations.
Tests like MapperWithExpressionTest are written to verify the functionality of the mapping implementations.
The use of @AfterMapping, @BeforeMapping, @ObjectFactory, Expression, and QualifiedByName methods are compared.
Overall, the example showcases how context annotation can be leveraged for complex source mappings in MapStruct.

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Dev

372

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How The JavaScript Event Loop Handles Asynchronous Code Execution

JavaScript event loop enables asynchronous code execution in a single-threaded environment by managing tasks using call stack, Web APIs, Task Queue, and Microtask Queue.
Call Stack: Functions are pushed and popped for execution, one at a time.
Web APIs/Node APIs: Provided by the browser or Node.js for async operations like setTimeout, fetch, DOM events, running outside the main thread.
Event Loop: Checks Call Stack first, then Microtask Queue, and Task Queue for handling async tasks continuously, ensuring smooth and responsive application behavior.

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Medium

285

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Building a Strong Coding Foundation

Newcomers to software development should focus on mastering the fundamentals of computer science and problem-solving skills.
Initial dedication of 1-2 years to building a strong foundation will pave the way for a successful programming career.
It's crucial not to rush into web or app development without a solid grasp of computer science basics.
Companies value problem-solving and fundamentals over flashy projects from beginners.
Adapting quickly to new technologies is more important than mastering them all at once.
Competitive coding, like participating in CodeChef contests, can enhance problem-solving abilities.
Understanding time and space complexity, implementing algorithms, and regular practice are key for growth.
Having a supportive coding community and participating in short format contests can aid in skill development.
Focus on mastering fundamentals before delving into advanced topics like design patterns and system design.
Continuous learning and practice are essential for ongoing improvement in coding skills.

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Johndcook

181

Trinomial Coefficients and Kings

Trinomial coefficients are a generalization of binomial coefficients to three variables.
Another use of trinomial coefficients is the coefficients of x^k in the expansion of (1 + x + 1/x)^n.
Trinomial coefficients can be visualized in a triangle analogous to Pascal’s triangle, where each entry is the sum of the three entries above it.
Trinomial coefficients relate to the moves of a king on a chessboard, representing the number of paths a king can take to a square using the minimal number of moves.

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Dev

226

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📘 Ultimate Guide to Download Coder Army System Design Notes for Free

Coder Army System Design Notes are a comprehensive resource for mastering system design concepts, available for free download.
The notes cover core principles, architectural concepts, scalability considerations, and real-world examples to enhance system design skills.
Reasons to choose Coder Army System Design Notes include comprehensive coverage, free access, community-driven content, and regular updates.
Access the notes via the Coder Army app for interactive features like live classes, lecture notes, and practice questions.

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Medium

176

Is Education Still the Key? Or Just a Broken Lock in a Fast-Moving World?

Education has evolved from a revered institution to a necessity for survival in different eras.
In today's fast-paced world, the traditional educational path is being challenged by alternative learning methods.
The focus of education is shifting towards critical thinking, problem-solving, communication, and adaptability.
While degrees are still valuable in certain fields, skills and practical experience are becoming increasingly important.
The current education system is criticized for its emphasis on memorization, grades, and outdated teaching methods.
Global challenges include competitive exams in countries like India, student loan debt in the U.S., and inadequate resources in developing regions.
There is a call to reform education by promoting creativity, financial literacy, emotional intelligence, and adaptability.
Learning opportunities have expanded with online resources, allowing individuals to learn anytime and anywhere.
Self-education offers flexibility but requires discipline and initiative to pursue knowledge effectively.
Education is seen as a tool for personal growth, societal contribution, and preparing individuals to tackle global challenges.

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Medium

122

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How to Browse the Web Undetected: Privacy in Virtual Environments

The article discusses a solution for browsing the web more privately, especially from virtualized environments, to bypass detection mechanisms used by websites.
Detection mechanisms used by websites often collect detailed information about your system without your knowledge, raising privacy concerns.
The developed solution is compatible with various platforms and environments, allowing users to override, hide, or simulate specific environmental behaviors via API wrappers.
Countermeasures such as simulating mouse events and overriding hardware identifiers aim to provide a more private browsing experience without being flagged for using virtual environments.

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7 Likes

Medium

362

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Virat Kohli Bids Farewell to Test Cricket: A Glorious Era Concludes

Virat Kohli bids farewell to Test cricket, ending a glorious era in his career.
Kohli amassed 9,230 runs in 123 Test matches at an average of 46.85, with 30 centuries and 31 fifties, and led India to the No. 1 spot in the ICC Test rankings.
His retirement decision was influenced by mental fatigue, as revealed by former coach Ravi Shastri.
Following retirement, Kohli sought spiritual guidance in Vrindavan, emphasizing a reflective transition from professional cricket to a more mindful lifestyle.

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Dev

226

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The Power of Thinking..."I CAN"

Struggling with creating a Chat UI, the author finally overcame the challenge with perseverance and determination.
The chat bubbles layout for group discussions was detailed, focusing on aligning profile images and message contents.
User message bubbles were designed without a profile image for simplicity and familiarity.
The message input area with textarea for typing messages and send button was highlighted as a crucial feature.
Image attachments were incorporated into the chat bubbles with expandable image overlays for enhanced user experience.
A modal overlay was set up for viewing attached images with navigation buttons for easy image browsing.
Chevron buttons were implemented to allow users to navigate between multiple attached images in the overlay.
Finalizing the UI design, potential improvements include refactoring message bubbles, adding attachment selection, and implementing auto-scroll functionality.
The author expressed satisfaction with the UI prototype while planning future enhancements for dynamic functionality.

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Medium

350

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Simple Ways to Improve Customer Experience With AI Checkouts

AI checkouts use technologies like computer vision, machine learning, and natural language processing to enhance the checkout process.
These systems, found in retail kiosks and self-service machines, offer fast, accurate, and tailored customer experiences.
For customers, AI checkouts provide convenience, speed, enhanced security, and personalized assistance.
Retailers benefit from improved efficiency, increased revenue, customer engagement, and access to real-time purchase data with AI-powered kiosk solutions.

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Johndcook

140

Riff on an integration bee integral

The integral posted online from this year's MIT Integration Bee appeared to be a beta function and required the substitution u = 1 - x2025 for evaluation.
The value of the integral was small due to numbers between 0 and 1 raised to large powers, making size estimation important in real applications.
Recognition of a beta function to evaluate an integral may seem like pulling a rabbit out of a hat initially, but it is a common practice in areas like biostatistics.
The integral in the Integration Bee question, although not a beta function, could be simplified by a u substitution, while altering the integrand could result in a beta function with an extremely small value.

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Dev

417

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🚀 Boosting Page Load Times: Practical Strategies for a Faster Website

Page load time plays a significant role in user experience and search engine rankings. Slow websites lead to increased bounce rates, decreased engagement, and negative SEO impact.
The article provides practical strategies to speed up website loading, categorized into network optimizations, resource optimizations, and server optimizations.
Network optimizations include using a Content Delivery Network (CDN), enabling compression like Gzip or Brotli, and implementing HTTP/2 for faster resource loading.
Resource optimizations involve minifying CSS, JavaScript, and HTML, deferring and async loading for scripts, choosing the right rendering strategy (CSR, SSR, SSG), implementing lazy loading, and tree shaking for removing unused code.
Additional tips include optimizing images with modern formats and lazy loading, creating a faster and smoother user experience.
Regular performance audits using tools like Lighthouse or PageSpeed Insights are recommended to ensure ongoing optimization and improvements.
Starting with basic optimizations like compression, CDN usage, and lazy loading, and gradually incorporating advanced techniques can greatly impact website speed.
Performance optimization is dynamic; keeping abreast of new tools and methodologies is essential for maintaining a fast website.
The article emphasizes the importance of a seamless user experience through speed enhancements and efficient resource utilization.
Optimizing images, utilizing modern formats, and scaling images appropriately are highlighted as effective strategies for reducing loading times.
In summary, the article provides actionable steps for improving website performance, ensuring a fast-loading, engaging user experience.

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25 Likes

Medium

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Deploying LLM APIs Offline on Your Local Machine

This article provides a guide on setting up a local LLM service without the need for internet or a subscription, allowing for experimentation with application development.
It is a continuation of a previous article that detailed running LLM locally on the console and Web UI.
The current article focuses on using the locally served LLM API and integrating it into application development, with Python examples provided.
The previous article explains the process of downloading the Serving Engine, Ollama, and running it on LLM models like Meta’s LLaMa 3.

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Dev

367

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SQL Made Easy: A Tutorial for Beginners

SQL, or Structured Query Language, is essential for interacting with databases and is approachable for beginners.
SQL enables tasks like finding specific information, adding new entries, updating records, and removing old ones in relational databases.
Learning SQL is valuable across various industries like web development, data analysis, business intelligence, and marketing.
In SQL, you use commands or queries to communicate with a database, akin to talking to a digital filing cabinet with tables, columns, and rows.
The SELECT command is fundamental in SQL for retrieving data from tables, specifying columns to view, and using WHERE clause to filter data based on conditions.
SQL operations, such as INSERT INTO, UPDATE, and DELETE FROM, form the CRUD operations for interacting with data.
Practice is crucial in mastering SQL syntax and combining commands and clauses effectively to manipulate data.
Developing SQL skills can lead to roles in data analysis, backend web development, marketing data management, and more.
SQL is a foundational skill that enhances career paths involving technology and data, making it a worthwhile skill to acquire.
By focusing on core concepts like SELECT, FROM, and WHERE, practicing regularly, and using beginner-friendly resources, learning SQL can be made easy.

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Dev

149

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The Key Role of Rotating Proxy Networks in Big Data Scraping and Analysis

Rotating proxies are essential for big data scraping and analysis, allowing users to change IP addresses for each request or after a set period.
They provide anonymity by masking identity, help bypass rate limits, access geo-restricted content, and improve the success rates of data collection.
Choosing the right rotating proxy service involves considering factors like IP pool size, geographical coverage, speed, reliability, and protocol support.
IP2World is recommended for its extensive range of residential IPs and services designed to enhance big data scraping efforts.

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