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Mastering Event Propagation in JavaScript: Bubbling vs Capturing

Event propagation in JavaScript involves the order in which event handlers are invoked in the DOM.
There are two phases of event propagation: Bubbling and Capturing.
Event Bubbling is the default phase where the event moves from the target element to its ancestors.
Event Capturing starts at the topmost ancestor and moves down to the target element.
Example code shows event propagation using capturing and bubbling phases.
Parent and child event handlers using capturing execute before the one using the bubbling phase.
Bubbling is useful for parent components reacting to child actions or event delegation.
Capturing is suitable for intercepting events early or preventing default actions.
You can control event flow using event.stopPropagation() and event.stopImmediatePropagation().
Understanding event propagation is essential for building efficient JavaScript applications.
Mastering bubbling and capturing helps in debugging and designing reusable components.

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Understanding State Management in Flutter: An Analogy for Writers and Programmers

State management in Flutter can be compared to writing a novel, where the state of the manuscript represents the current condition of the writing process.
BLoC acts as the bridge between actions (events) and the manuscript's condition (state), making decisions on how the manuscript should evolve.
The analogy extends to a barista in a coffee shop, illustrating the separation of requests (events), processes (BLoC), and outputs (states) for organized workflow.
By applying this concept to a Flutter application for jotting down writing ideas, users can interact with events like adding new ideas and viewing loading indicators.
The states in such an application could include initial loading, loaded with ideas, idea saving in progress, and error states.
The BLoC takes events and translates them into corresponding states to manage application behavior.
On the UI side, BlocBuilder is used to update the view based on changes in state from IdeaBloc, maintaining a reactive UI.
Structuring code with the BLoC pattern offers clarity and organization similar to structuring a story for writers, enhancing application functionality and elegance.
Despite an initial learning curve, the BLoC pattern proves beneficial for complex applications requiring long-term development, similar to outlining a novel before writing.
In conclusion, understanding and implementing state management with BLoC can lead to cleaner, scalable, and testable applications for writers and programmers alike.

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Dev

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10+ Best Next.js eCommerce Templates for 2025

Creating an eCommerce online store from scratch can be challenging, but using Next.js eCommerce templates can simplify the process.
These templates offer modern designs, advanced UI elements, and powerful features for building functional online stores with simple and scalable codebases.
10+ best Next.js eCommerce templates are highlighted in the post, each with unique features and designs to aid in creating impressive online stores.
Key reasons to choose a complete Next.js eCommerce template include fast loading times, readiness for growth, modern tech stacks, mobile-friendly designs, and developer-friendly setups.
The templates mentioned in the post leverage advanced technologies like Next.js, React, TypeScript, Tailwind CSS, Stripe, and more to streamline the eCommerce development process.
Examples of the featured templates include NextMerce, CozyCommerce, Bazaar Pro, Medusa + Next.js, Next Shopify Starter, Hot-Kicks, Clare, Boundless Commerce, Singitronic, Shopware Frontend, Dstoneva E-commerce, and Tech Bazar.
These templates cater to various needs, such as polished storefront layouts, integrated CMS capabilities, headless eCommerce setups, tech store optimizations, and more.
Each template offers different tech stacks and functionalities tailored to launch online stores efficiently and effectively.
Next.js simplifies the process of developing fast and scalable eCommerce sites, and the templates mentioned provide a solid foundation for building successful online stores.
Customizing these templates to fit a specific brand and launching an online store with confidence is encouraged by trying out the highlighted Next.js eCommerce templates.

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Day 9: Supercharge FastAPI with Async Programming

Day 9 of the FastAPI Zero to Hero series explores Async Programming, a powerful tool in web development.
Async programming allows programs to continue working on other tasks while waiting for slow operations.
In FastAPI, using async functions enables managing numerous requests concurrently and optimizing server resources.
A comparison between synchronous and asynchronous code in FastAPI highlights the efficiency and scalability of async programming.
Async programming is beneficial for interacting with external services, improving response times, and scalability.
By simulating delayed external API calls, the article demonstrates how async programming in FastAPI can significantly enhance performance.
Async programming in FastAPI is recommended for tasks like calling external APIs, fetching data with async drivers, and network I/O.
The article concludes that async programming is a game-changer for creating scalable and responsive online APIs.
Async programming can greatly enhance backend performance and user experience in various applications.
The article is eligible for web story generation as it provides concise insights into utilizing Async Programming in FastAPI for improved performance.

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Logrocket

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Leader Spotlight: Cascading down a product-led culture, with Mike Fantigrassi

Mike Fantigrassi is the Head of Product at National Academy of Sports Medicine (NASM), leading the transition to a product-led growth model.
NASM is part of Ascend Learning, focusing on fitness and wellness certifications, which recently shifted to a product-led approach.
The transition was supported by leadership, implemented through cross-functional product delivery teams led by product managers.
Challenges in delivering products were highlighted, including the importance of customer discovery and internal alignment.
Change management aspects such as role clarity and communication were crucial during the transition.
Prioritization and executing big initiatives were discussed, emphasizing the need for foundational processes to support higher-level initiatives.
An early win in the transition was offering a payment option for a membership program, leading to increased subscriptions.
Benefits of the product-led approach included improved output, revenue increase, and better understanding of the customer journey.
Advice for other leaders looking to transition included company-wide training, leadership alignment, proactive communication, and fostering a culture of sharing and learning.

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Dev

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How to Set Up GitHub Login in SafeLine

SafeLine now supports GitHub authentication for users to securely log in using their GitHub identity.
To set up GitHub OAuth application, users need to create a GitHub OAuth application on GitHub's official documentation and obtain ClientID and ClientSecret.
Steps to configure the GitHub OAuth application include creating the app, setting the application name, homepage URL, and authorization callback URL.
The Authorization callback URL is formed by appending /.safeline/auth/api/callback/github to the Homepage URL.
In SafeLine, users should go to the Safeline Console, navigate to Auth -> Settings, and choose GitHub under Third-Party Login Configuration.
Configuration fields in SafeLine include ClientID (GitHub application ID) and ClientSecret (GitHub application secret).
After configuring, users should click the Submit button in SafeLine to complete the binding.
Users can select the GitHub login method after enabling the AUTH feature for the application.
New users will be prompted for authentication, and Safeline administrators must review and confirm in the console.
Authorized users will not need extra reviews for subsequent access; they can log in successfully.
Users who haven't passed the review will be blocked from accessing the application.

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Building Robust API Rate Limiters: A Comprehensive Guide for Developers

API rate limiting is crucial for controlling traffic to prevent performance issues, costs, and service outages.
Rate limiting restricts the number of API calls per specified time period to maintain system stability.
Benefits of implementing API rate limiting include preventing resource exhaustion, enhancing security, and cost control.
Common rate limiting algorithms include Token Bucket, Leaky Bucket, Fixed Window Counter, and Sliding Window Log.
Implementing rate limiting in Node.js, Python with Flask, and Java with Spring Boot is demonstrated.
Best practices include communicating limits clearly, using proper response headers, and implementing graduated rate limiting.
Standardized rate limiting headers and status codes facilitate effective API communication.
Testing rate limiters with comprehensive tests ensures they function correctly under different scenarios.
Advanced strategies like Dynamic Rate Limiting, Machine Learning-Based Rate Limiting, and Client-Side Rate Limiting provide more flexibility.
API rate limiting is essential for protecting services, ensuring fair resource distribution, and maintaining high availability.
Implementing robust and scalable APIs with effective rate limiting strategies is key to handling real-world traffic patterns.

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🛠️ End-to-End CI/CD with AWS — Test, Build & Deploy to S3

The article provides a guide on setting up an end-to-end CI/CD process on AWS.
The setup includes AWS CodePipeline, AWS CodeBuild, and S3 for hosting a static website.
It features a separate unit testing stage before the build process.
This project covers steps for running unit tests, building various types of web apps, and deploying to an S3 bucket.
The automation is achieved using AWS CodePipeline.
A dedicated CodeBuild project is used for running unit tests and ensuring code quality before proceeding to build and deploy stages.
After successful testing, a second CodeBuild stage is triggered for the build and deployment to S3.
The built files are uploaded to S3 for hosting static websites either through a public endpoint or CloudFront.
The article also provides a link to the GitHub repository with step-by-step instructions.
The setup is recommended for frontend developers, DevOps engineers, or anyone interested in AWS CodeBuild, CodePipeline, and S3.
Key tools used include AWS CodePipeline, AWS CodeBuild, AWS S3, and GitHub for source control.
Readers are encouraged to clone the repository, test the setup, and seek further assistance.
The process emphasizes proper testing, automation, and eliminating manual deployment hassles.
The end-to-end CI/CD process aims to streamline web application deployments effectively using AWS services.

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Medium

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Writing to the NTAG 424 DNA

Near Field Communication (NFC) technology has advanced with chips like the NTAG 424 DNA, offering secure, tamper-evident tags for authentication and security systems.
A guide is provided for setting up an NTAG 424 personalization server simplifying tag usage.
The NTAG 424 DNA chip provides secure tagging capabilities.
The solution involves three main components for tag personalization with unique cryptographic keys.
Steps include cloning the repository, installing dependencies, and configuring the environment.
The server offers a REST API for NFC operations, providing reader status, UID, tag settings, and authentication.
Personalizing tags involves generating unique keys and configuring tag settings with a URL template.
Upon tapping the tag, information is decrypted by the server and displayed on the backend.
The API allows easy integration into existing infrastructure for various functionalities.
The server enhances NFC security, offering cryptographic authentication and anti-counterfeiting solutions.
Detailed logging and troubleshooting options are available for seamless implementation.
An emphasis on protection against counterfeit attempts and ease of integration is highlighted.
Users are encouraged to clone the repository and implement NFC security solutions in their projects.

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Dev

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Git: using --interactive mode to commit specific parts of a file

To commit specific parts of a file, use --interactive mode with git add.
Identify untracked file with git status and make git track it with git add -N command.
Use git add --interactive to customize commits on a line-by-line basis.
Enter 'patch' in the prompt to access interactive mode.
Select the file and choose specific lines to include in the commit.
Edit the contents in the text editor to customize commit contents.
Review changes with 'diff' and exit interactive mode when done.
Commit the selected changes using git commit -m command.
For remaining content, stage and commit separately using git add and git commit commands.
Keep track of commits with git log for a clear listing.

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How to Learn AI from Scratch

The article provides a practical guide for software engineers to navigate and thrive in the AI landscape, covering topics on using AI effectively, building tools, vibe coding, model selection, application development, and more.
Tools like ChatGPT, Claude, Gemini, Grok, Gamma.app, Perplexity, and Rovo Chat are discussed for integrating AI into everyday tasks and specific projects.
The importance of vibe coding, prompt engineering, and utilizing specific tools like Task master and Memory bank is emphasized for enhancing productivity with AI.
The article delves into model selection with platforms like OpenRouter, Ollama, and gemini-balance, highlighting the importance of understanding trade-offs in performance, constraints, access, and costs.
Strategies for AI application development, including the concept of RAG (Retrieval-Augmented Generation), fine-tuning, and evaluation and observability tools like LangSmith and LangFuse, are discussed.
The conclusion encourages starting with real-life problems in AI development, emphasizing curiosity and momentum over credentials in the learning process.

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Medium

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Kubernetes Scaling Strategies: 4 Approaches Every Engineer Should Know

This article discusses four key Kubernetes scaling mechanisms that every DevOps engineer, platform architect, or backend developer should understand.
The first approach is ideal for stateless services to maintain responsiveness during load spikes and reduce idle resource consumption.
The second approach is suitable for monolithic applications or workloads where more resources per pod improve performance.
Cloud integration allows this mechanism to work with major platforms like AWS, GCP, and Azure.
The third approach involves autoscaling to ensure infrastructure meets demand without manual intervention.
The fourth approach is useful for systems with predictable traffic patterns like e-commerce or media streaming.
The article also mentions resources for learning system design and coding interview preparation.
Current Guidelines:
3. Grokking the Advanced System Design Interview: Learn system design through architectural review of real systems.
4. Grokking the Coding Interview: Patterns for Coding Questions: Faster preparation for coding interviews.
5. Grokking the Object Oriented Design Interview: Learn to prepare for object-oriented design interviews with practice questions.
6. System Design Course Bundle
7. Coding Interviews Bundle
8. Tech Design Bundle
9. All Courses Bundle

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Dev

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HarmonyOS Learning: Third-Party Open Source Libraries

HarmonyOS app development benefits from third-party open source libraries via the OpenHarmony Package Manager (OHPM) for efficient, streamlined work.
OHPM is the official HarmonyOS package management tool, offering a wide array of verified open source libraries for different functions.
Key functions of OHPM include library management, project integration, compatibility verification, and fostering the developer ecosystem.
Common types of open source libraries encompass UI components, network requests, state management, utilities, and multimedia tools.
The library integration process involves configuring the environment, retrieving libraries, installation commands, code referencing, and version management.
Suggestions include prioritizing recommended libraries, monitoring library activity, controlling dependencies, managing local caches, and conducting security audits.
Third-party open source libraries are crucial for HarmonyOS with OHPM simplifying library management; future advancements are expected.
Developers are advised to leverage these resources and contribute to the HarmonyOS community for mutual benefit and enhanced efficiency.

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🔢 Count the Number of Arrays with K Matching Adjacent Elements LeetCode 3405 (C++ | Python | JavaScript)

LeetCode 3405 is a hard problem related to combinatorics.
The problem involves finding the total number of 'good arrays' meeting specific criteria.
Criteria: Elements in the array lie in the range [1, m] and exactly k adjacent indices have equal values.
The result needs to be returned modulo 10⁹ + 7 due to large results.
Approach: Choose k positions to be equal, and for the rest, have m - 1 options.
Formula: Number of such arrays = C(n - 1, k) x m x (m - 1)^(n - 1 - k)
C++ and Python code solutions are provided for the problem.
The C++ solution involves precomputing factorials and inversions, and utilizes combinatorial functions.
The JavaScript solution also precomputes factorials and inversions, employing modular exponentiation.
Python code initializes values, calculates modular inverse, and implements combinatorial functions.
The problem showcases the use of modular combinatorics, fast exponentiation, and factorial precomputation with inverse modulo.
It requires mathematical insight rather than just raw implementation.
The problem serves as a good template for combinatorics-based questions with constraints up to 10⁵.

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Dev

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🚀 Building Lightning-Fast Search with search-plus-ts: A Full-Stack TypeScript Solution

The article discusses building a lightning-fast, real-time search system using TypeScript, Hono, and React.
It introduces search-plus-ts, a lightweight TypeScript-native search library for powerful and simple search.
The tutorial covers setting up the backend with Hono server and implementing the search functionality.
It then explores building the React frontend for user interaction with instant search results and highlighted matches.
The article highlights the 'highlightWordsTag' function as the secret sauce for professional search result highlighting.
Running the application is simplified by a monorepo setup with workspaces for concurrent backend and frontend runs.
The architecture's benefits include separation of concerns, performance optimization, great developer experience, and scalability.
Real-world applications and advanced features for enhancing search functionalities are also discussed.
Key takeaways emphasize the importance of the right tools like search-plus-ts, Hono, React, and TypeScript for building efficient search experiences.
The article concludes with an invitation to try building a search-powered application and asks for readers' planned search features.

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