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Claude Opus 4 Humbles Dev, Fixes 4-Year Bug in 30 Prompts

A Reddit post on r/ClaudeAI Subreddit revealed how a seasoned C++ developer was humbled by Claude Opus 4 by fixing a bug that persisted for almost four years.
The bug stemmed from a large-scale architectural refactor involving around 60,000 lines of code, introducing an elusive edge-case failure related to shader usage.
Using the Claude Code with the Opus 4 model, the developer resolved the bug in about 30 prompts, uncovering a subtle architectural dependency that had previously gone unnoticed.
While the developer had tried other models like GPT-4.1 and Gemini 2.5 without success, Claude Opus 4 proved instrumental in diagnosing the underlying issue and providing actionable insights, indicating a milestone in how senior developers may collaborate with AI coding assistants.

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Nordicapis

143

How to Turn Any API Into an MCP Server

Model Context Protocol (MCP) allows AI agents to connect with external resources and data, similar to smartphone apps.
MCP consists of a host application and MCP servers, where multiple tools or AI agents can connect to these servers.
New tools facilitate transforming APIs into MCP servers, but some limit the customization in creating them.
This tutorial demonstrates creating an MCP server from an OpenAPI specification and integrating it into an LLM using Cursor and APIDog.
To start, create an API access token with APIDog and a virtual environment for the project.
Configure the MCP server in Cursor by setting up MCP.json with the API specification details.
Interact with the API specification through Cursor using the built-in LLM to explore endpoints and HTTP methods.
You can set up the MCP server to execute coding tasks and directly make changes to the code in Agent mode.
Installing the MCP SDK allows testing tools by connecting to the MCP server and calling specific endpoints.
Turning APIs into MCP servers automates tasks, improves productivity, and avoids recreating tools for new technologies but requires secure practices.

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Javacodegeeks

295

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Best Practices for Storing and Validating Passwords in Java (BCrypt, Argon2, PBKDF2)

Java developers face the dilemma of choosing the best algorithm for storing and validating passwords. BCrypt, PBKDF2, and Argon2 are explored with examples in Spring Security integration.
Storing passwords as plain text is a severe security risk, emphasizing the use of one-way hash functions with salting and multiple iterations to prevent brute-force and rainbow table attacks.
BCrypt is widely favored in Spring Security due to its salting and work factor features. PBKDF2 offers more control over salt length, iterations, and hash algorithm, while Argon2 is modern and designed to resist both CPU and GPU cracking.
For most web apps, BCrypt is recommended as the default choice, PBKDF2 is suitable for FIPS-compliant hashing or greater configuration flexibility, and Argon2 is advisable for high-security applications. Choose the appropriate algorithm based on your specific requirements.

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Medium

339

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Top 10 Programming and Development Software in 2025

VS Code remains a popular choice with its speed, flexibility, and rich library of extensions for various languages.
Copilot X offers advanced code suggestions, block writing, and deeper repository integration for developers in 2025.
IntelliJ IDEA is unmatched for Java and Kotlin development with its smart suggestions and powerful features.
Docker leads in container development, offering simplicity with Docker Desktop for local environments and cloud workflows.
Tools like Postman for API development, GitLab for DevOps, PyCharm for Python, Figma for design, Replit for cloud IDE, and Cloud9 for browser-based coding also top the list in 2025.

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Medium

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The Dolly Zoom

The dolly zoom, also known as the Hitchcock shot or Vertigo effect, is a mesmerizing camera technique used in movies like Vertigo or Jaws.
It plays tricks on our perception by making the background seem to stretch or compress dramatically while the subject stays the same size.
It's created by combining camera movements of moving the camera forward while zooming out, or moving the camera backwards while zooming in.
The dolly zoom effect creates a surreal perspective distortion that amplifies the emotional impact of a scene, drawing viewers into the moment.

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Dev

304

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Punjab Kings: Enthusiasm, Guarantee, as well as IPL Beauty Mission

Punjab Kings (PBKS), formerly known as Kings XI Punjab, is a popular franchise in the Indian Premier League (IPL), with a strong fan base and exciting matches.
The team has had a roller-coaster journey in the IPL, experiencing moments of brilliance, near misses, and underachievement.
PBKS has seen inconsistent performances over the years, despite starting strong in the inaugural season and making it to the semifinals.
Known for their explosive batting line-ups, PBKS has featured players like Glenn Maxwell, Chris Gayle, and KL Rahul who brought flair to the team.
In 2014, led by George Bailey and powered by Maxwell, PBKS reached their first IPL final but fell short of winning the title.
The team underwent a major rebranding in 2021, changing from Kings XI Punjab to Punjab Kings, aiming for a fresh start and renewed focus on success.
PBKS has had several captains over the years, with KL Rahul and Shikhar Dhawan providing stability in leadership.
Despite boasting star players like Gayle, Maxwell, and Rahul, PBKS has struggled with consistency, especially in the bowling department.
Recent seasons have seen PBKS trying to build a competitive team with a mix of youth and experience, but inconsistency continues to be a challenge.
The team enjoys strong support from fans in North India and has invested in off-field initiatives like grassroots cricket and fan engagement.

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Dev

268

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useCallback in React: Memoizing Functions to Prevent Re-Creation

The useCallback hook in React is used to memoize functions and avoid unnecessary re-creation, especially when passing functions as props to child components.
By using useCallback, you store the reference of a function, improving performance by preventing new function creation on each render.
The syntax of useCallback involves importing it from React and defining a memoized function with optional dependencies.
Without useCallback, functions re-create on each render, potentially causing performance issues.
Usage of useCallback optimizes scenarios like event handlers, preventing unnecessary function re-creations.
In cases involving API calls or state-dependent functions, useCallback helps optimize by memoizing functions only when dependencies change.
The key difference between useCallback and useMemo is that useCallback memoizes function references, while useMemo memoizes computed values.
For function memoization, useCallback is the preferred choice, while useMemo is suitable for memorizing expensive calculations.
In conclusion, useCallback is a valuable tool in React for optimizing performance by avoiding unnecessary function creations.
Remember that using useCallback can significantly enhance the efficiency of your React applications by reducing re-renders and improving overall performance.

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16 Likes

Medium

411

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Calculating Bond Yields With the Newton-Raphson Method

Moody’s downgraded U.S. sovereign debt from AAA to AA+, pushing 20-year and 30-year bond yields over 5%.
Newton-Raphson method is being used to calculate bond yields amidst economic uncertainty and fears of recession.
Bond yield is the effective annual interest rate of a bond, representing the benefit for buyers and the cost for sellers.
The method involves finding the root of a function using iterative guesses to determine bond yields like the 4.34% yield on a U.S. Treasury bond.

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24 Likes

Dev

214

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Python Functions and Method

Python programming revolves around the use of functions to enhance code reuse, efficiency, and manageability.
Functions in Python aid in code reusability by allowing code blocks to be executed multiple times by calling the function name.
Python offers built-in functions like print(), len(), and user-defined functions established using the 'def' keyword.
Methods in Python, which are similar to functions but belong to classes or instances, provide access to object properties for manipulation.

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12 Likes

Dev

380

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Exploring customLogger: Smart, Customizable Logging in Payload CMS

Payload CMS is a developer-centric, customizable, and API-driven content management system based on Node.js and TypeScript.
Key features of Payload include TypeScript-first structure, modern admin interface, built-in security, and hooks/plugins support.
The payload-auditor plugin in Payload CMS offers precise audit capabilities for all operations on collections, ensuring transparency and reliability in logging.
Custom logging is crucial for tracking user activities and data changes in CMS, providing customization, transparency, security, and analytics benefits.
The customLogger feature in the payload-auditor plugin allows developers to customize logging behavior at different levels, enhancing logging flexibility and precision.
CustomLogger supports multi-level customization, including operation-level, hook-level, global hooks level, and global level, with defined execution priority.
The customLogger function structure includes inputs like hook arguments and log fields and requires returning a specific output, allowing for detailed logging customization.
Best practices for utilizing customLogger include keeping log structure simple, avoiding storing sensitive data, and using async operations for external data processing.
Utilizing customLogger in Payload CMS projects enhances logging accuracy, enables specific change tracking, and helps in faster debugging and security monitoring.
CustomLogger in payload-auditor can be instrumental in building a reliable logging infrastructure, enhancing audit capabilities, and serving as a critical component in security strategies.

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22 Likes

Medium

174

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“Judge me while you are best”

Judging others without acknowledging our own imperfections creates a false sense of superiority.
It is important to remember that what we criticize in others may exist in ourselves.
Judging others can be detrimental and foster resentment, misunderstandings, and emotional harm.
Instead of rushing to judge, offering empathy and understanding can create a more compassionate community.

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10 Likes

Analyticsindiamag

196

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When Rust Rusts the Developer Experience

Rust is the most admired programming language according to Stack Overflow’s 2024 Developer Survey, promising fast code and memory safety.
However, Rust's strict rules around lifetimes and trait bounds led to challenges for the team, slowing progress and hindering day-to-day development.
Some companies, like Amazon Prime Video, Meta, Figma, and Discord, have successfully implemented Rust to achieve significant performance gains.
Microsoft chose to rewrite the TypeScript compiler in Go instead of Rust due to trade-offs in portability and ergonomics, indicating the challenges of adopting Rust even for large organizations.

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11 Likes

Medium

424

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My Story: From High School in Argentina to the world

Tomas Di Mauro, a 19-year-old from Argentina, shares his journey from high school to driving a project in Malaysia.
Initially struggling with loneliness and self-doubt, Tomas found solace in computers and programming during high school.
His interest in competitive programming and web development grew, leading to early successes like placing 5th nationally in the Argentine Informatics Olympiad.
During the pandemic, Tomas focused on programming, securing his first job at a VC firm at 16 and winning hackathons in Argentina and Thailand.
Tomas spearheaded a suicide prevention app and a money transfer wallet, demonstrating the positive impact of technology on society.
Despite setbacks like lost luggage and illness, Tomas showcased his projects at international events and learned valuable lessons in resilience.
Selected for an accelerator program in Malaysia, Tomas made the bold decision to pause university studies and jobs to focus on launching ChatterPay.
His message to students is to explore passions, embrace challenges, and pursue opportunities with courage and dedication.
Tomas' journey exemplifies the power of curiosity and perseverance in opening doors to incredible experiences and achievements.
He encourages others to bravely discover their potential and take bold steps towards their dreams.

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25 Likes

Medium

129

File inclusion vulnerabilities in common programming languages with examples

Attacker's goal is to alter a variable in functions like include or require to inject malicious code from a remote source.
To prevent File Inclusion vulnerabilities in PHP, validate all user input before using it in the application.
Using a whitelist of accepted parameters or predefined switch/case statements is recommended to prevent such vulnerabilities.
JavaServer Pages (JPS) can include files for execution at runtime, which can lead to remote code execution on a vulnerable server.

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7 Likes

Medium

161

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GetX Workers: The Background Processing Feature 85% of Flutter Developers Never Use

A fintech startup's Flutter app faced issues with UI lag during market data updates, impacting real-time trading dashboard performance.
By implementing GetX workers to handle data processing separately, the app's performance significantly improved, maintaining smooth 60 FPS even during market volatility.
This simple solution prevented the startup from losing a major client due to performance issues, showcasing the effectiveness of utilizing GetX workers.
Despite the success story, a survey revealed that only 15% of Flutter developers at FlutterCon Europe had ever used GetX workers, highlighting an underutilization of this valuable feature.

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