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🚀 🧠 Java Stream API Practice Guide – Concepts and Real-World Use Cases

Java Streams are used for declarative data processing.
List of important Java Stream API methods and their use cases:
1. map() - Transform each element.
2. filter() - Remove elements based on a condition.
3. flatMap() - Flatten nested collections into a single stream.
4. collect() - Terminal operation to accumulate stream results.
5. toMap() - Create a map from stream data.
6. groupingBy() - Group elements by a classifier function.
7. partitioningBy() - Split elements into two groups.
8. reduce() - Combine elements into a single result.
9. distinct() - Remove duplicates.
10. sorted() - Sort the stream.
11. limit() / skip() - Pagination-style control.
12. anyMatch(), allMatch(), noneMatch() - Test if elements match a condition.
13. findFirst() / findAny() - Get an optional element.
14. peek() - Debug intermediary steps.
15. count() - Count elements in the stream.
Practice Ideas: Use a single object model like Developer, Project, and Department.
Relationships like skills, salary, projects, and more can be practiced with this model.

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Dev

408

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What do you think of this?

An open-source chat app was developed as part of the T3 Clone Competition, inspired by t3.chat.
Core features of the chat app include Google and Anonymous auth, multi-model support, real-time updates, file uploads, chat branching, syntax highlighting, markdown support, and bring-your-own-key feature.
The trickiest feature to implement was chat branching and shareable threads, involving snapshotting and creating isolated threads when replying to a shared chat.
Interested users can access the app live at https://ch4t.codse.com and find the open-source code at https://github.com/codse/chat.
Despite not being perfect and lacking features like image generation and smoother streaming, the project provided valuable insights into real-time UX.
The developer is seeking feedback on the app and suggestions for improvements or future developments.

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Medium

295

Why Understanding Try-Except in Python is Essential for Every Programmer

Try-except block in Python is crucial for handling errors that may occur during program execution.
It helps in preventing unexpected crashes, especially when dealing with user input that can be unpredictable.
The try block contains the code that might raise an error, while the except block specifies what to do if an error occurs.
Additional keywords like else and finally can also be combined with try-except for more robust error handling.
Using try-except allows programs to handle various types of errors, such as ValueErrors, without halting execution.
Properly handling errors ensures smooth program execution and minimizes unexpected crashes.
While try-except is beneficial, it's important to be cautious about its usage, such as catching specific errors and providing helpful messages to users.
Avoid using a general except block and ensure that try-except is applied judiciously in areas where errors are likely to occur.
By utilizing try-except along with effective error handling practices, Python programs can become more robust and user-friendly.

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Medium

300

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5 things startups will do instead of testing with real users.

Brand designers show mockups to buyers in pre-sales deck hero slides, translating nods as 'strong buy-in'.
Weekly 'validation sessions' involve clicking through choreographed prototypes, collecting ad hoc feedback without challenges.
Product managers spend days decoding feedback from Account Managers, only to reply vaguely about implementation.
Startups invest in tools like Amplitude for data-driven design decisions, debating retention challenges without user insights.
Despite efforts, design debt grows and user feedback remains unaddressed, leading to persistent issues.

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Dev

308

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Smarter Frontends with AI: Building Intelligent UI Features in 2025

Frontend development has evolved towards intelligent interfaces that anticipate user needs, enabled by AI-powered UIs and modern tools like OpenAI and Vercel.
Implementing AI-driven features in Next.js apps, such as conversational UI, AI-enhanced search, automated summaries, and vector-based recommendations, can greatly enhance user experiences.
AI chatbots in Next.js provide instant assistance to users, improving customer satisfaction and engagement.
AI-powered semantic search in Next.js enhances search accuracy by understanding user intent and context, leading to higher conversions and improved user experience.
AI-generated summaries in Next.js make content more accessible and engaging, boosting user retention and accessibility without requiring deep AI knowledge.
Vector search with AI provides highly personalized content suggestions, benefiting user engagement and discoverability of relevant items.
Practical tips for performance and cost considerations when integrating AI features include caching, batch requests, edge functions for low latency, and monitoring usage carefully to optimize costs and user experience.
The article emphasizes starting small and scaling smart when integrating AI into frontend projects, focusing on enhancing user experience and iterating based on feedback.
Integrating AI features should prioritize clear UX and meaningful interactions to bring genuine value to users.
The guide equips developers with the knowledge, code snippets, and strategies needed to build smarter frontends powered by AI, emphasizing valuable, intuitive interactions over complexity.

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Logrocket

229

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Leader Spotlight: Leading product in a nonprofit organization, with Don Boulia

Don Boulia, Chief Product and Technology Officer at Charity Navigator, discusses his transition from for-profit to nonprofit product management.
Transition challenges include focusing on revenue over profit and aligning with the deeper missions of nonprofits.
Charity Navigator measures success through revenue, impact reach, and influencing donations to rated nonprofits.
Introducing a formal product management function involved defining roles, stakeholder mapping, and educating on product terminology.
Implementing agile practices, roadmapping, OKRs, and KPIs helped Charity Navigator think and act more like a product organization.
Indicators of the organization's shift include ROI assessment, capacity evaluation, mission alignment, and asking relevant product-focused questions.
An example of successful product management adoption is the Causeway product that simplifies donating to causes by curating top nonprofits.
Applying product management principles to Causeway marked a turning point in Charity Navigator's approach.

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Hackernoon

170

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New Biome Release Offers Faster Linting With TypeScript-Like Precision

Biome v2, codenamed Biotype, offers type-aware rules without relying on TypeScript, improving performance while maintaining advanced linting capabilities.
The release includes features like the noFloatingPromises rule and Assist actions for import organization and attribute sorting.
With Vercel's support, Biome aims to compete with ESLint and Prettier in the JavaScript and TypeScript linting space.
JSON module scripts are now baseline in modern browsers, simplifying working with structured data directly in JavaScript.
This feature, enabled via import attributes, aims to enhance standard module behavior on the web and improve developer workflows.
ES2025 introduces nine new JavaScript features including RegExp.escape(), Float16Array, Promise.try(), Iterator Helpers, and more.
Astro 5.10 introduces live content collections for real-time updates and stable responsive images to improve Core Web Vitals.
Additionally, Bun 1.2.16 brings file routing support, memory leak fixes, and Node.js compatibility enhancements for web app workflows.
Tool highlights include LogTape for structured logging, Hono web framework for cross-runtime development, and MockRTC for WebRTC testing.
"This Week in JavaScript" newsletter covers new releases, updates, and tools relevant to JavaScript developers.
Subscribe for more insights and share with fellow developers to stay informed about the latest in the JavaScript ecosystem.

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Hackernoon

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Vibe Coding Explained in 5 Levels of Sophistication

Vibe coding, a technique in software development, allows developers to write natural language prompts instead of code.
It enables non-professional developers to build software without extensive training by using large language models (LLMs) to generate code.
Vibe coding shifts developers to a more declarative and intention-based approach, focusing on high-level abstraction rather than implementation details.
AI plays a significant role in refactoring and handling complexities automatically, emphasizing the clarity of prompts for successful output.
The practice, introduced by Andrej Karpathy, abstracts programming into a prompt-driven process using LLM models.
Vibe coding enhances productivity, encourages rapid prototyping, and changes traditional software development methods.
AI collaboration patterns introduce new challenges but enable fast MVP development and coding automation.
Vibe coding leads to extreme acceleration of prototyping cycles and democratized access to programming capabilities.
GitHub Copilot and similar tools facilitate a hyper-productive pair-programming environment, blurring the line between human and AI interaction.
The future of programming lies in AI collaboration to amplify human creativity and efficiency in software development.

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Hackernoon

100

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Tricentis’ Elastic Execution Grid Promises Scalable, Maintenance-Free Cloud Testing

Tricentis' Elastic Execution Grid offers a cloud-based testing solution for faster, flexible, and maintenance-free testing.
The Elastic Execution Grid allows running tests on cloud infrastructure that scales resources as needed.
It supports running tests on Tricentis cloud resources without the need to maintain your own infrastructure.
The framework-agnostic E2G can be used with various frameworks like Tosca or PowerShell.
E2G consists of agents, agent services, characteristics, and runners for efficient test execution and result collection.
Tests can be pushed to E2G, tagged with characteristics to ensure correct tooling, and executed on agents.
Debugging in E2G is similar to local testing, with detailed reports for pass/fail outcomes.
Security measures in E2G include SOC/ISO compatibility, temporary VMs, encryption, and data storage policies.
Limitations in E2G include default restrictions on concurrent agents and artifact sizes.
The author recommends trying out cloud-based testing with E2G for managing testing resources efficiently and conveniently.

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6 Likes

Medium

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Juris and JurisKit: The True Write Once, Run Everywhere Full-Stack JavaScript Solution

Juris and JurisKit aim to provide a write-once, run-everywhere solution for full-stack JavaScript development.
Traditional SSR frameworks often require duplication of code for server and client-side logic, leading to bugs.
JurisKit allows for writing code once in a single file using a universal pattern that executes on both server and client.
The createAPIClient function in JurisKit automatically adjusts behavior based on the environment, optimizing performance.
JurisKit simplifies state hydration, ensuring seamless data transfer from server to client.
The architecture of JurisKit allows components to generate optimized HTML strings on the server without the need for a separate templating system.
Global state management in JurisKit enhances performance, enabling faster server-side rendering.
Compared to other SSR solutions, JurisKit offers elegance and simplicity with minimal lines of code for server-side rendering.
JurisKit's architectural design simplifies routing logic, offering a straightforward mental model for developers.
Local component state is automatically included in hydration in JurisKit, ensuring seamless continuity between server and client.
The framework's headless router provides clean and declarative routing that functions uniformly on server and client.
JurisKit provides an intelligent file stitcher tool for combining components effortlessly without complex build configurations.
Real-world measurements showcase significant improvements in server-side rendering speed, client-side hydration, and bundle size with JurisKit.
JurisKit prioritizes reducing cognitive load for developers, allowing them to focus on business logic rather than infrastructure complexity.
JurisKit's approach emphasizes simplicity and ease of use compared to other powerful frameworks like React Server Components.
The future focus of JurisKit includes ongoing development and enhancements to provide a user-friendly and efficient development experience.

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Dev

391

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Need a SaaS MVP in less than a month? WE'LL MAKE IT HAPPEN

Fredy Rivera, founder of Rivera Solutions, helps bring game-changing ideas to life by building web apps, MVPs, SaaS platforms, and AI integrations.
Rivera offers full-stack expertise in technologies like FastAPI, Python, Jinja2, and TailwindCSS for fast and reliable development.
The tech partner emphasizes real-world impact with solutions such as chatbots, legal assistants, and health-tech dashboards.
Rivera ensures clear communication, async-first workflow, and detailed documentation to streamline the development process.
Services provided include free project consultation, AI feasibility review, flexible part-time commitment, and transparent progress reporting.
Rivera's work can be explored at https://riverasolutions.vercel.app/

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Infoq

141

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Spring News Roundup: Spring Vault Milestone, Point Releases and End of OSS Support

The Spring ecosystem saw significant activity during the week of June 16, 2025, with milestones and point releases across various projects.
Spring Vault 4.0 released its first milestone, while Spring Boot, Security, Authorization Server, Session, and others had point releases.
Several Spring projects, along with Spring Framework, will end OSS support on June 30, 2025.
Spring Boot versions 3.5.1, 3.4.7, and 3.3.13 brought bug fixes, documentation improvements, and new features.
Spring Security 6.5.1, 6.4.7, and 6.3.10 introduced bug fixes and new features like migration guides.
Spring Authorization Server, Spring Session, Spring Integration, Spring Modulith, Spring REST Docs, Spring AMQP, and others had updates with bug fixes and enhancements.
Spring Web Services 4.0.15 released with dependency upgrades and bug resolutions, addressing thread safety issues.
The first milestone release of Spring Vault 4.0 aligned with Spring Framework 7.0 and introduced new features for better null safety and HTTP implementations.
Multiple Spring projects will cease OSS support on June 30, 2025, with enterprise support ending in 2026.
Numerous details on the releases and updates can be found in the respective release notes.
The article provides a comprehensive overview of the Spring ecosystem updates and upcoming end of OSS support dates.

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Dev

321

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Destructuring Arrays

Destructuring allows unpacking values from arrays or properties from objects into distinct variables.
Instead of accessing elements by index, destructuring enables pulling specific items with names directly.
Array destructuring simplifies assigning array elements to variables in a single line of code.
Assignment with destructuring involves declaring variables inside square brackets and matching them to array elements based on positions.
Skipping elements in array destructuring is possible using a comma as a placeholder for the skipped element.
The rest operator (...) gathers remaining elements into a new array, and it must be the last element in the destructuring pattern.
Default values can be provided in array destructuring to handle missing elements in the array.
Destructuring offers a concise way to swap values of variables without a temporary variable.
In React, array destructuring is commonly used with hooks like useState for concise code and clear variable naming.

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Johndcook

308

Arithmetic for fun and profit

A blog post written four years ago discussed using simple solutions like division and multiplication for client problems.
The author recalled a conversation with a friend where division was highlighted as a key recommendation.
During a recent deposition, the author had to explain using a ratio to arrive at a number in a report.
It was mentioned that sometimes more complex solutions are needed despite the actual solution being simple.
In another instance, the author was asked to calculate car momentum using mass and velocity, which involved multiplication.
The author declined the car momentum project suspecting there was more complexity to the problem.
Real-world problems can be more intricate despite seemingly simple solutions at times.
Complicated solutions may be needed, such as cepstrum analysis, or simple arithmetic may suffice.
The post reflects on different scenarios where arithmetic plays a role in problem-solving.
Sometimes the journey to a solution is complex, or the nature of the problem itself is inherently complicated.
The key takeaway is that arithmetic, whether simple or complex, can be a valuable tool in addressing various challenges.
This post on 'Arithmetic for fun and profit' was originally published on John D. Cook's blog.

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Dev

321

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🚀CSS Secrets That Will Change How You Code Forever

Discover hidden CSS capabilities that most developers never learn, but pros use daily to create stunning web experiences.
CSS holds secrets beyond basic tutorials, offering advanced techniques for complex layouts, interactive experiences, responsive design, and cleaner code.
Container Queries enable modular design systems, Pure CSS Tooltips replace JavaScript libraries, and Next-Level Hover Effects create engaging animations.
Intelligent Typography with fluid scaling, CSS Scroll Snap for effortless navigation, and Smart Theme Systems for adaptive colors are among the powerful techniques.
CSS Grid revolutionizes layout systems, while Physics-Based Animations and Advanced Selectors provide organic motion and surgical precision.
CSS Houdini extends CSS with JavaScript through custom properties, paint worklets, and layout algorithms, promising future-ready design capabilities.
Performance optimizations, development strategies, and browser support details accompany each CSS secret, guiding developers towards efficiency and compatibility.
Embrace CSS's potential to craft exceptional user experiences, ensuring technical prowess enriches usability, accessibility, and performance.
Mastering these techniques unlocks the full power of CSS for creating intelligent, responsive, and engaging web interfaces that leave a lasting impression on users.
The future of web development lies in utilizing CSS's hidden powers while prioritizing user experience, accessibility, and performance to craft exceptional digital products.
Transform your CSS skills by implementing these cutting-edge techniques progressively, sharing your journey, and contributing to the evolving landscape of frontend development.

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