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Knowridge
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Seashell-inspired materials could revolutionize car bumpers and bandages
- Marine animals' strong and complex shells have inspired engineers to create a synthetic material mimicking the layered structure of seashells.
- The research aims to develop programmable multilayered materials that can intelligently respond to physical impacts, enhancing energy absorption in products like car bumpers and bandages.
- The team led by Professors Zhang and Sigmund published their findings in Science Advances, highlighting the effectiveness of materials with many layers in distributing stress and improving safety.
- Though challenges exist in replicating the theoretical design precisely, fine-tuning the programming has enhanced the material's effectiveness, offering potential applications in safer cars, stronger buildings, and smarter medical devices.
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Dev
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đź“ť Building Your First Smart Contract on Arbitrum (Without Losing Your Mind)
- Arbitrum offers low gas fees, fast transactions, and Ethereum compatibility for building smart contracts.
- The tutorial walks through creating a simple 'On-chain Guestbook' where users can submit their name and message, stored publicly on the blockchain.
- Tools used include Solidity for smart contract language, Hardhat framework, MetaMask for transaction signing, and the Arbitrum Sepolia Testnet for deployment.
- Steps cover setting up MetaMask, writing the smart contract, configuring Hardhat, getting RPC and Private Key, deploying to TestNet, and key takeaways on building on Arbitrum.
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Dev
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ContextumAI: Secure, On-Chain MCP Server Deployment for Decentralized AI
- ContextumAI provides a secure platform for deploying and managing Model Context Protocol (MCP) servers in decentralized settings with on-chain permissioning and tokenized governance.
- Current MCP server deployments lack standardization, on-chain verifiability, and proper governance or access control.
- Contextum's architecture includes containerized MCP runtimes, CLI tooling for simplifying workflows, smart contracts for deployment metadata, and a governance layer governed by the CTXM token.
- The roadmap includes phases for launching a decentralized image registry, implementing DAO governance, and integrating enterprise deployments, aiming to bridge Web3 infrastructure with AI serving for autonomous agents.
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Dev
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Enable or Disable console.log Globally in JavaScript
- During development or debugging, you may need to enable or disable logging globally in a JavaScript application.
- To achieve this, store the original console.log function and create a control function that toggles logging on and off.
- By setting logging_enabled to true or false, you can control whether console.log behaves as usual or becomes an empty function.
- This method provides global control over logging, allowing you to keep the console clean and prevent unnecessary clutter during debugging.
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Medium
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295
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5 C# And .NET Tips & Tricks — May 2025
- Using DateTimeOffset.UtcNow is recommended over DateTime.Now to avoid time zone issues and improve testability.
- Global query filters in Entity Framework Core can help eliminate repetitive Where statements in LINQ queries.
- Concurrent collections are recommended for multi-threaded applications to ensure thread safety and better performance.
- Managing user secrets using Visual Studio's secret manager tool provides a secure way to store sensitive information.
- The secret manager tool stores secrets in a separate JSON file during development, enhancing security.
- Base64Url is a helper that makes converting strings to URL-friendly Base64 format easy and efficient.
- For production environments, override the configuration to use secure providers like Azure Key Vault or AWS Secrets Manager.
- Avoid storing production secrets in easily accessible files like appsettings.production.json for enhanced security.
- Base64Url provides a simpler way to handle Base64 encoding for URL-friendly strings, ensuring compatibility.
- The article provides practical examples and tips to enhance development practices in C# and .NET programming.
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Medium
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210
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Why Every Software Developer Should Have a Side Project
- Side projects are essential for software developers, helping them become more resourceful, confident, and efficient problem solvers.
- Working on side projects allows developers to learn new skills that their job might not provide, expanding their expertise beyond their current role.
- Side projects encourage developers to adopt a product owner mindset, leading to a sense of ownership, better decision-making, and improved design skills.
- Engaging in side projects provides tangible proof of a developer's abilities, showcasing initiative, autonomy, and the ability to deliver results, which can be impressive to employers and collaborators.
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Dev
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Managing CallbackQuery and message types in Telegram bots
- A method was created in the library to detect the type of message sent by the user in a Telegram bot.
- Values returned by the method include 'text', 'photo', 'video', 'audio', 'document', 'sticker', 'animation', 'location', 'contact', 'poll'.
- Constants for message types were put in the Message class for easy access and usage in conditions.
- A separate method 'isCallbackQuery' was developed to detect when a client clicks on an inline button in the Telegram bot, providing access to the callback data.
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Dev
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🔍 A Deep Dive Into Arbitrum: Ethereum’s Layer 2 Supercharger
- Arbitrum is a Layer 2 scaling solution for Ethereum, enhancing its capabilities without compromising security using Optimistic Rollups.
- Transactions on Arbitrum are batched off-chain, with results settled on Ethereum, providing low fees, fast transactions, and Ethereum-level security.
- Arbitrum's Optimistic Rollups assume transaction validity, allowing challenges for fraud detection, creating an efficient trust-but-verify model.
- Arbitrum serves as a high-speed express lane for Ethereum, enhancing scalability and enabling various applications such as DeFi, GameFi, NFT platforms, and cheap governance for DAOs.
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Dev
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Go router navigation observer
- go_router is a popular package for managing navigation in Flutter, recommended by the Flutter team.
- Introduction of ShellRoute made observing navigation flow more difficult as the app loses reactivity to route changes.
- You can implement route-aware behavior by listening to the GoRouterDelegate until an official solution is provided.
- The provided code snippet showcases how to use the GoRouterDelegate to achieve route-awareness in a Flutter application.
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Medium
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AI Isn’t Replacing Developers – But Stagnation Might
- AI tools are being used by developers to generate boilerplate, solve edge cases, and debug code.
- The conversation around 'AI replacing developers' is becoming more real as AI proves its capabilities.
- It's not a competition between AI and developers but about developers who adapt to new technologies.
- AI can assist with coding tasks, but still lacks the ability to understand product goals, anticipate business logic, navigate legacy code, and communicate effectively with humans.
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Medium
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Cracking Open the Code: A Beginner’s Guide to White-Box Testing Techniques
- White-box testing techniques, also known as structure-based testing, involve examining and testing the internal structure of the code.
- The goal of white-box testing is to ensure that every line and decision in the code works as expected.
- Statement coverage technique in white-box testing involves testing lines of code to achieve a certain coverage percentage.
- Testing both true and false outcomes and ensuring full decision coverage are essential in white-box testing for accurate logic testing.
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Hackernoon
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The HackerNoon Newsletter: Is AI Making People Delusional? (5/17/2025)
- The HackerNoon Newsletter for May 17, 2025, presents top quality stories including discussions on '9 Quadrillion Reasons Web3 Still Isn’t Ready', 'Is AI Making People Delusional?', and 'How to Become Mr. Worldwide and Get Your Articles Translated to 77 Different Languages'.
- In the article 'Is AI Making People Delusional?' by @zacamos, the spread of AI is linked to a new psychological phenomenon known as AI-induced delusion, shedding light on the darker impacts of AI chatbots.
- Readers can dive into various topics on technology and writing in the newsletter, along with an invitation to answer some of the greatest interview questions of all time.
- The newsletter invites readers to explore a range of articles and share the content with friends, ending with warm regards from The HackerNoon Team.
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Medium
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Visibility: The Hidden Force That Breaks or Builds Your Code
- Visibility is crucial in multithreaded systems to ensure that shared variables are always up-to-date across threads.
- In Java, the volatile keyword is used to enforce that a variable is always read from and written to main memory.
- The happens-before relationship and ordering guarantees provided by volatile are essential for proper visibility in Java.
- Java's java.util.concurrent.atomic.* package offers lock-free, thread-safe classes for ensuring visibility and handling concurrency.
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Medium
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252
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Why Most Tech Teams Are Just Faking It
- Many tech teams are faking productivity and progress by following processes and tools without real clarity or direction.
- The emphasis is often on continuous shipping to show progress rather than pausing to assess if the work makes sense.
- Teams may end up with products that technically function but lack usability or understanding due to rushed and incomplete work.
- The culture of constant sprinting without reflection can lead to chaotic and superficial development processes.
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15 Likes
Medium
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Demystifying Java Streams: A Beginner-to-Intermediate Guide with Real-Life Tasks
- A Stream in Java is a sequence of elements supporting functional-style operations, not a data structure.
- Streams reduce boilerplate, encourage readable, functional code, and work beautifully with functional interfaces in java.util.function.
- Stream operations consist of stages: data source, transformation without consumption, and terminal operation.
- Java Streams empower developers to write shorter, cleaner, safer, and faster code through declarative thinking.
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