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Make A Automatic Door Closer MiniatureUsing Arduino Uno

A miniature automatic door closer can be created using an Arduino Uno by utilizing optocouplers such as A10026 sensors.
The kit includes an optical beam sensor with digital and analog output that can be connected to any microcontroller. It operates on 3.3V to 5VDC and provides a HIGH voltage output when the beam is blocked.
The microcontroller can interpret the 0-5-0V pulse train to detect an obstacle blocking the sensor. The module features LEDs for power and digital output indicators.
A motor servo actuator can be controlled by the Arduino to move and close the door based on programming requirements. It has the capability to move 90 degrees to the left or right.

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Javarevisited

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How to loop over two dimensional array in Java? Example

To loop over a two-dimensional array in Java, you can use nested for loops.
Two-dimensional arrays are commonly used in various applications like finite state machines, board games, and arcade games.

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Dev

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Single Core Hundred Thousand Concurrency（1751084926454900）

Achieving high concurrency on single-core processors through event-driven, async I/O technologies.
Evolution from traditional threading models to event-driven architecture for better performance.
Detailed implementation of concurrency manager and event-driven processor for efficient handling.
Performance testing shows handling over 100k connections, proving event-driven advantages.

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Dev

398

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From Frustration to Flow: How Keploy Changed the Way I Test APIs

The author describes their frustration with manual API testing, spending hours crafting test cases and feeling uncertain about coverage.
They discovered Keploy, an AI-powered tool that generates API tests based on real user behavior, providing accurate test cases in minutes.
With Keploy, the author transitioned from zero coverage to confidently testing all major flows effortlessly, saving time and gaining trust in their test suite.
Keploy transformed the author's testing experience from a burden to a natural, trusted process, showing a smarter way to ensure APIs are tested based on actual usage.

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Python Blogs

383

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What are the benefits of using exclusive stock photos?

Exclusive stock photos offer a range of benefits beyond traditional stock photography, as they are licensed to a limited number of users or even just one, making them unique assets for brands or individuals.
Benefits include brand differentiation, better visual consistency, boost in credibility and professionalism, lower risk of brand confusion or duplication, licensing peace of mind, and higher return on investment.
Exclusive stock photos help maintain a distinctive visual identity, provide a cohesive visual experience, elevate brand appearance, prevent brand confusion, offer simplified licensing agreements, and drive more engagement.
Overall, exclusive stock photos are a smart investment for brands and creators seeking originality, consistency, and legal protection in their visual content.

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Cssauthor

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HTMX vs. React: Which is Better for Your Next Project? (2025)

Choosing between HTMX and React boils down to project type, team expertise, and complexity.
HTMX suits content-focused sites and simplifies backend interactions, while React excels in complexity.
HTMX leverages plain HTML with server logic, while React focuses on component-driven UI building.
HTMX offers simplicity with server-side state, while React provides rich, interactive client-side experiences.
Both tools have strengths; deciding between them depends on project requirements and team capabilities.

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Dev

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How to use python pixi with ruff in vscode?

To use Python Pixi with Ruff in Visual Studio Code (VSCode), set up a Pixi virtual environment (venv) and select the Python interpreter location.
Install Ruff in the virtual environment using "pixi add ruff" command and specify the Ruff version (>=0.12.0,<0.13) in the dependencies section of the TOML file.
Install the VSCode extension charliermarsh.ruff and configure the Ruff interpreter by specifying the Python interpreter location in the workspace settings.
After successful configuration, you should see the Ruff output in VSCode, indicating the usage of interpreter and other settings.

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Medium

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Iran’s political show

Iran admitted that its nuclear facilities were seriously damaged after initially denying any explosion.
The change in statement came after US-Israel air strikes caused heavy losses, including B-2 bombers dropping bunker-buster bombs.
Initially downplaying the damage, Iran's shift in narrative occurred after facing threats from Trump.
The situation highlights Iran's attempt to save face amidst concerns over its nuclear ambitions and international scrutiny.

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Dev

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FastAPI: A Python Web Framework for NodeJS Developers

FastAPI is a modern Python web framework that simplifies development challenges.
It comes with built-in features, speed comparable to Express.js, error prevention, and auto documentation.
FastAPI handles automatic data validation, path parameters, async support, and more.
It offers a structured approach to middleware, has a steeper learning curve than Express.js.
Transition tips include embracing Python types, understanding async, and utilizing key resources.

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Dev

129

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Automating Persistent AI On the Fly

A developer worked on a financial market data microservice project with various technologies like FastAPI, Docker Compose, PostgreSQL, Redis, Kafka, and Cursor AI.
The project involved purpose-driven AI orchestration with clear goals, adherence to project rules, and rigorous validation of AI-generated fixes.
The architecture included components like FastAPI with dependency injection, PostgreSQL via SQLAlchemy ORM, Redis caching, Kafka, Docker Compose, Prometheus metrics integration, Grafana dashboard, structured logging, and GitHub Actions for CI/CD.
The developer learned to handle Redis connection failures, manage Kafka consumer groups effectively, implement async await patterns, and build robust error handling for external API dependencies.

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Dev

306

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Alternative of 'for' in Python

There are alternatives to using 'for' loops in JavaScript for processing elements in a list to reduce code and keep it simple.
Using lambda expressions can achieve the same behavior as traditional functions in Python.
Instead of using a 'for' loop to process elements in a list, options like 'map' and list comprehensions can be used.
For tasks like filtering elements based on a condition or checking if a value exists in an array, functions like 'filter' and 'in' operator can be employed.

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Medium

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Linear Regression: From Zero to Hero

Linear regression explains complex systems with a simple straight line on a graph.
History of linear regression dates back to Gauss and Legendre in the 1800s.
It is widely used in various fields due to its simplicity and interpretability.
Key aspects include weights, bias, error, and cost functions for evaluation.

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Dev

314

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🌍 Build My Own Telegram Translator Bot with Python

Jean has developed LinguaTranslateSpark, a Telegram bot built in Python that instantly translates text in over 100 languages.
The bot allows users to translate text, change target languages, save preferences, and can be deployed in minutes.
The bot uses python-telegram-bot to abstract the Telegram API, deep-translator for Google Translate, async I/O with async def to improve real-time experience, and context.user_data to remember user preferences.
The project teaches about callback queries, session state management, choosing between async and sync operations in bots, and error handling for network failures or API limits.

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Dev

189

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How I Created Keppli Finance: An AI-Driven App That Transforms Personal Money

Transforming personal finance through AI-driven mobile app Keppli Finance.
Lack of financial literacy inspired creation of app offering personalized insights and automation.
AI features include automatic expense categorization and future plans for voice interface.
Agnostic architecture ensures flexibility in integrating various AI models and external services.

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Medium

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Here’s how you can check and download your REET 2025 result and certificate step-by-step:

To check your REET Result 2025, visit either reet2024.co.in or rajeduboard.rajasthan.gov.in and follow the steps to select your level, enter details, and view your result.
To download your REET Certificate, visit reet2024.co.in, submit your roll number and DOB, download the certificate PDF, and collect it from the assigned nodal centre with ID proof.
The REET result declared on May 8, 2025, showed an overall pass rate of around 50.8%, with Level 1 at approximately 62.3% and Level 2 at about 44.6%.
For those who passed, keep both the result and certificate safe and await recruitment notices from the Rajasthan Education Department. For those who didn't pass, note the validity of the REET certificate for life and prepare for future attempts.

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