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Dev
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Check24 Junior Analyst Interview & A/B Testing
- The individual had an interview at CHECK24 Vergleichsportal GmbH for a Junior Analyst position five weeks ago.
- During the interview, a detailed A/B testing question was posed regarding running an email campaign with a 3% discount.
- Inspired by the question, the interviewee created a comprehensive A/B testing guide covering everything from ideation to result analysis.
- The guide includes information on test design, sample size determination, and test duration decisions.
- The interviewee aims to share the A/B testing guide to assist others in acing their interviews.
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Dev
7d
8
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Browser Security in 2025: Architecture & Dev Trade-offs
- Browser security is rapidly evolving with Chrome leading in sandboxing, Brave and Firefox prioritizing privacy, and Edge focusing on resource efficiency.
- Developers need to balance compatibility, performance, and privacy when creating web applications amid the changing browser landscape.
- Understanding security architecture like site isolation, sandboxing, and data collection practices can help in designing resilient systems.
- Chrome dominates with 67% global market share, while Firefox, Brave, and privacy-focused browsers like DuckDuckGo offer unique security features.
- Key features of Chrome include site isolation and sandboxing, while Firefox excels in tracking protection and Brave in ad blocking and fingerprinting protection.
- Performance and resource usage comparisons show Edge and Brave offering a good balance, while Firefox prioritizes privacy over performance.
- Enterprise considerations highlight Chrome's advanced features, Edge's integration with Microsoft 365, and specialized browsers like Island/Talon for enhanced security.
- Challenges include cross-browser compatibility and memory/performance overhead, with solutions like feature detection, optimization, and testing.
- Best practices for web devs involve configuring privacy settings, updating browsers and OS, using dedicated password managers, and implementing layered security measures.
- The article discusses practical tips, technical challenges, and the importance of understanding browser security differences for developers.
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Infoq
7d
252
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Java News Roundup: MicroProfile, Open Liberty, TomEE, JobRunr, LangChain4j, Apple SwiftJava
- This Java news roundup includes updates on MicroProfile 7.1, Apache TomEE 10.1, LangChain4j 1.1, Open Liberty, JobRunr 8.0 beta, and Apple's SwiftJava utility.
- JDK 25 Build 28 was released with various fixes, while JDK 26 Build 3 also addressed multiple issues.
- Jakarta EE 11 ballot concluded, and the release date celebration is impending.
- Spring projects received point releases, with OSS support ending on June 30, 2025.
- MicroProfile 7.1 introduces updates to Telemetry and Open API specs.
- Open Liberty 25.0.0.6 integrates Microprofile Health 4.0 specification and enhances health check mechanisms.
- JobRunr 8.0.0 beta 2 features Carbon Aware Job Processing and Kotlin serialization support.
- LangChain4j 1.1.0 release includes various modules for developer use.
- Apple's SwiftJava offers Java-Swift interoperability tools, recently introduced at WWDC25.
- Apache TomEE 10.1.0 and Log4j 2.25.0 releases bring bug fixes and updates aligned with MicroProfile.
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Dev
7d
323
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Boost Your Code: 15 Essential Visual Studio Extensions Every Developer Needs
- Visual Studio is a vital IDE for developers working with various technologies, with extensions enhancing productivity and code quality.
- Essential extensions like Visual Studio IntelliCode, CodeMaid, and Roslynator streamline coding tasks and improve code maintainability.
- Tools like Live Share enable real-time collaboration, while Visual Assist enhances C++, C#, and VB.NET development.
- Extensions such as VSColorOutput, SonarLint, and Web Essentials 2022 aid in code readability, quality, and web development tasks.
- Visual Studio Spell Checker ensures clear communication in code, while Trailing Whitespace Visualizer helps maintain code cleanliness.
- Markdown Editor, Glyphfriend, Productivity Power Tools 2022, and GitHub Extension for Visual Studio offer utilities for markdown editing, code navigation, and GitHub integration.
- The NuGet Package Manager simplifies .NET library management, a fundamental tool for Visual Studio developers.
- These extensions optimize developer workflows, enhance coding experiences, and are crucial for software engineering efficiency and collaboration.
- The article provides valuable insights into essential Visual Studio extensions to empower developers in crafting high-quality software.
- It emphasizes the importance of integrating these tools for precision, speed, and efficient software development.
- The curated list showcases tools that tackle various coding challenges while enhancing the overall developer experience.
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Dev
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194
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WWDC 2025 - SF Symbols 7: Advanced Animation and Rendering Techniques
- Apple's SF Symbols 7 introduces advanced animation and rendering techniques for iOS app interfaces.
- Core architecture of SF Symbols involves vector-based construction and layer-based structure.
- New animation presets include Draw On and Draw Off for symbols appearing and disappearing.
- Playback options offer various ways to animate symbols by layer, whole symbol, or individually.
- Directional intelligence ensures symbols draw contextually and support variable draw rendering.
- Enhanced Magic Replace feature maintains visual continuity during symbol transitions.
- Gradient rendering adds visual enhancement with smooth gradients and lighting simulation.
- Custom symbol annotation includes guide point system and specialized guide point types.
- Weight interpolation system simplifies annotation for different symbol weights.
- API implementation details for SwiftUI, AppKit, and UIKit are provided.
- Best practices cover performance optimization, design considerations, and development workflow.
- Migration strategy involves auditing existing symbols and identifying animation opportunities.
- SF Symbols 7 offers iOS developers precise control over symbol presentation and behavior.
- Developers can leverage the advanced features to create sophisticated app interfaces.
- The guide emphasizes performance optimization and design considerations for symbol animations.
- SF Symbols 7 marks a significant advancement in iOS interface design capabilities.
- The implementation guide assists developers in utilizing the new features effectively.
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Medium
7d
643
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How I Built a $500 Daily Income with This Simple Tool
- The AMZ Money Machine is a system designed for Amazon Kindle Publishing, enabling users to earn around $500 daily with minimal effort.
- Users don't need prior experience or technical skills to use this system, making it suitable for beginners and experienced entrepreneurs alike.
- The platform automates the process of finding and creating profitable books, simplifying income generation.
- Many users, like John, have seen success with earnings totaling over $18,947 collectively in a month.
- Some users have made over $2,000 in their first month by uploading multiple pre-made books.
- The system involves a one-time investment without any hidden fees, promising a lifetime income potential.
- AMZ Money Machine offers a risk-free satisfaction guarantee, allowing users to explore the opportunity without pressure.
- For just $17, users can start their journey towards creating a reliable income stream through the AMZ Money Machine.
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Dev
7d
257
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Declarative Programming: SQL, HTML, CSS, Prolog Guide
- Declarative programming focuses on 'what to do,' abstracting away implementation details for code that is readable, concise, and maintainable.
- SQL exemplifies declarative programming, allowing users to specify data retrieval intentions without procedural instructions.
- HTML and CSS demonstrate declarative approaches in defining web page structure and styling for separation of content and presentation concerns.
- Prolog showcases declarative reasoning by declaring facts and rules for symbolic reasoning and logic-based queries.
- Declarative programming enhances readability, maintainability, and reduces side effects, offering higher abstraction and parallelization opportunities.
- Resources like guides, best practices, and comprehensive language overviews support mastering declarative programming principles.
- Understanding and embracing declarative programming elevates software engineering skills by emphasizing clarity, intent, and efficient development.
- Declarative programming enables cleaner code, improved collaboration, and resilient applications in modern software development.
- Key concepts discussed include the power of SQL for data manipulation, HTML/CSS for web design, and Prolog for logic-based programming.
- Practical benefits of declarative programming include readability, maintainability, and a focus on solving problems effectively.
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Dev
7d
141
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UI/UX - 大規模な CSS への対応
- SCSSはCSSを効率的かつ構造的に書くための拡張言語であり、主な機能には変数、ネスト、ミックスイン、インポートがある。
- 変数を使うことで値を管理しやすく、一箇所修正するだけで変更が反映される。
- ネストを利用することでCSSセレクタを入れ子に書き、より読みやすいコードを作成できる。
- ミックスインはCSSのまとまりを定義し、繰り返し使用することができる。
- SCSSを導入することでCSSによるスタイル定義が構造的に整理され、大規模アプリのスタイリング管理が容易になる。
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Medium
7d
24
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How a Simple App Helped Me Create Kids’ Books in Any Language
- A parent shares how they used an AI kids' book creator app to craft stories in multiple languages effortlessly.
- The app allows easy translation of stories into various languages with the click of a button, making storytelling more engaging.
- The app's AI technology generates tailored narratives around different themes or morals for children.
- Creating a story with the app, the parent observed their child picking up phrases in Spanish, German, and Mandarin effortlessly.
- The app acts as both a creative outlet and an educational tool, helping children recognize words and phrases in different languages, sparking a passion for learning.
- The voice feature of the app makes stories interactive, keeping children interested and engaged throughout.
- The app is recommended for busy parents who want to encourage creativity and language learning without the need for writing experience.
- Parents can create new stories quickly and explore diverse cultures through translated stories, promoting a love for learning.
- The app is described as the World's First AI App That Creates Stunning Talking Kids Books, offering joy and educational benefits.
- Using this tool, the parent noticed their child becoming more imaginative and enthusiastic about learning new words in multiple languages.
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Dev
7d
410
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Text Compressing Introduction - Huffman Coding in Swift
- The article introduces Huffman coding and its importance in text and code compression.
- Huffman coding is preferred for daily files like source code, JSON, XML, and plain text as it assigns shorter bit sequences to common characters and longer ones to rare ones, achieving significant compression.
- The article explains how Huffman trees work, with visual examples, and provides a step-by-step guide on implementing Huffman coding from scratch.
- The author discusses why Huffman coding is suitable for text/code compression and demonstrates it using the example of compressing the word 'Mississippi' to just 3 bytes.
- The compression system includes components such as frequency analysis, Huffman tree construction, bit-level file operations, and compact tree serialization.
- The article mentions the CLI tool 'Kompressor,' named after a plushie cat, that signifies compression and never fully 'decompresses.'
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Medium
7d
336
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This SQL Query Looked Fine — Until It Silently Broke Everything
- Periodic CPU spikes were observed on a SQL Server instance causing stored procedures to time out.
- Despite no suspicious changes or deployments, the issue persisted leading to further investigation.
- Upon examining the execution plan, it was discovered that failing stored procedures accessed the same table (referred to as Transactions).
- An Index Scan on the Transactions table was highlighted as a major factor in the performance problem.
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Dev
7d
186
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Build a sanctions check in 10 minutes with SanctionSnap API
- SanctionSnap API allows screening names against global sanctions lists with one HTTP request.
- To get started, sign up for a free API key on sanctionsnap.com and create the key in the Dashboard.
- Perform a quick health check using a simple curl command.
- Conduct a single-name search by sending a POST request with the desired name like 'Vladimir Putin'.
- Batch screen multiple names by sending a POST request with a JSON payload containing the names to screen.
- Each record in the batch screening provides an indication if it's a match and any associated hits.
- An example Python code snippet demonstrates how to use the API for screening names.
- An example Node.js code snippet showcases another way to utilize the API for screening purposes.
- Users can also upload CSV/XLSX files in the Web Console for one-click batch checks.
- The full documentation is available for more advanced search functionalities.
- SanctionSnap API simplifies the process of checking sanctions without the need for manual CSV file parsing.
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Dev
7d
311
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Stop Duct-Taping Context Into Prompts: Meet the MCP Server
- The Model Context Protocol (MCP) addresses the context crisis in AI agent systems by providing structured memory and context management.
- MCP serves as a centralized system that manages and serves context to agents, tools, and orchestrators, allowing for scalable and stateless AI applications.
- It separates the logic of a system from what it knows and how it remembers, improving scalability and coordination in agent-based development.
- The MCP server handles identity resolution, memory abstraction, goal distribution, and contextual routing for agents, enhancing their efficiency.
- An MCP request involves agents querying the server for context bundles, enabling them to stay stateless and focused on tasks.
- Without an MCP server, agents struggle with context management issues, leading to brittle systems and complex debugging processes.
- As the AI ecosystem grows, the need for efficient context routing becomes crucial, with MCP servers offering a practical solution for managing context.
- The article outlines upcoming topics in the series, including building MCP servers, enabling agent-to-agent communication, and exploring tools for multi-agent systems.
- By embracing MCP and protocol-thinking, developers can create modular and scalable agent-based applications, improving developer experience and system design.
- Building with MCP enables developers to future-proof their applications, ensuring scalability and efficiency even in experimental stages.
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Medium
7d
269
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Discovering Generator Functions in JavaScript
- Generator functions in JavaScript allow for pausing and resuming execution, making them useful for handling large datasets.
- Defined using the function* keyword, generator functions utilize the yield keyword to pause execution and return values to iterators.
- The for...of syntax can be used with generator functions to iterate over the generated values.
- Executing a generator function returns an iterator object known as a Generator with methods like next(), return(), and throw().
- Generator functions can be used with Array.from() to work with the generated values using array methods.
- Delegating iteration in generator functions can be done using the yield* expression.
- Yield* allows iterating over arrays, other generators, strings, Maps, WeakMaps, Sets, and WeakSets in a generator.
- Generator functions are beneficial for scenarios like fetching paginated data from APIs by incrementally making requests.
- Exploring further practical use cases and implementations of generator functions can provide deeper insights into JavaScript development.
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Johndcook
7d
141
Uniformity increases entropy
- Entropy in a system is maximized when all possible states are equally likely.
- Conversely, entropy is minimized when one outcome is certain to occur.
- Moving towards uniformity increases entropy, while moving away from uniformity decreases entropy.
- Entropy of a system with probabilities pi is defined by a specific formula.
- If one probability is 1 and the rest are 0, entropy is 0.
- When all probabilities are equal (pi = 1/n), entropy is log2(n), which is the maximum entropy.
- The entropy function is concave, leading to entropy decreasing as movements away from uniformity occur.
- Approaching the global maximum entropy of equal state probabilities results in monotonic entropy increase.
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