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How I Made $1,000 Selling AI Prompts This Month

PromptBuddy is a platform that allows you to create, manage, and sell AI prompts effortlessly.
No technical skills are required to use this platform and set up a prompt store.
Users can generate up to $1,000 in a month by selling prompts online.
PromptBuddy offers automated features, unlimited coupons, and a supportive community for creative professionals.

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Johndcook

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Estimating satellite altitude from speed

Using the formula v² = μ/r, the altitude of a satellite can be estimated based on its speed and standard gravitational parameter.
The apparent angular velocity of a satellite in an orbit can be calculated using the formula v/r = √(μ/r³), where v is the velocity and r is the orbit radius.
By subtracting the earth's angular velocity from the satellite's angular velocity, the apparent angular velocity from the perspective of an observer on the surface of the earth can be obtained.
To estimate the altitude of a satellite, its apparent angular velocity can be compared to the angular size of the moon or a region of space.

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Dev

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🚀 PReQual - Pull Request Quality Manager

PReQual is an end-to-end pull request quality management system that uses Pulumi's GitHub provider and Automation API.
It automatically configures repositories with branch protection rules and provides a contributor recognition dashboard.
PReQual combines infrastructure-as-code with workflow analytics to track PR activities and team collaboration patterns.
The system is hosted on an Azure VM provisioned through Pulumi, creating a seamless pipeline from GitHub events to analytics.
Phases of the project included infrastructure setup, webhook processing, data management, and frontend development.
PReQual aims to reward contributors, balance review workloads, and maintain consistent quality standards in repositories.
It uses Pulumi's GitHub provider to create standardized repositories and manage webhook configurations.
Pulumi's Automation API is integrated into the application for deploying infrastructure and managing GitHub settings.
The approach benefits users by enabling easy creation of GitHub resources and ensuring consistent quality standards.
Pulumi Copilot was used to explore PReQual, helping the developer in identifying and resolving issues during the development process.

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Dev

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Reverse-Engineering Cookies with Ktor and Ksoup

Tabroom is a website used by the Speech & Debate community for tournament data and management.
The author developed a TabroomAPI that required reverse-engineering the Set-Cookie header for accessing new content.
The Tabroom API is not widely accessible to the public and lacks comprehensive documentation.
The process involved utilizing Ktor, HttpClient, Jsoup, and Ksoup libraries for HTTP requests and HTML parsing.
Methods were created to retrieve session ID by reverse-engineering the Set-Cookie header.
The article contains code snippets demonstrating the implementation on the JVM platform.
An explanation is provided on inspecting HTTP requests and retrieving the session token from Tabroom's login form.
The login function handles the authentication process by sending username and password to retrieve the session ID.
Upon successful login, the session ID token is stored for subsequent requests to the Tabroom API.
The author concludes by highlighting the importance of proper authentication for accessing and retrieving data from websites.

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Medium

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I tested the best language models for SQL query generation. Google wins hands down.

A comparison was made between Google Gemini Flash 2.0 and other major large language models for SQL query generation.
Models were evaluated using a custom framework with 40 financial questions, aiming for perfect results.
Gemini Flash 2.0 outperformed other models with a 92.5% success rate and cost significantly less.
Claude 3.7 Sonnet, despite scoring high on perfect queries, was 31.3 times more expensive than Gemini.
Gemini Flash 2.0 was found to have a 40x better cost-performance ratio compared to Claude 3.7 Sonnet.
Cheaper models like Gemini proved to be more efficient in SQL generation compared to expensive options.
Gemini Flash 2.0 was highlighted as the best performer for SQL query generation, challenging the notion that higher cost equals better performance.
NexusTrade, a platform utilizing Gemini Flash 2.0, offers accurate financial question responses with in-app tutorials for algorithmic trading.
In conclusion, Google's Gemini Flash 2 emerged as the superior and cost-effective choice for SQL query generation, potentially saving thousands of dollars.
Users are advised to consider Gemini Flash 2 for applications requiring large-scale SQL generation due to its efficiency and cost-effectiveness.

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Medium

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The 7-Step Website Formula I Wish I Knew as a Beginner

Beginner web developers often struggle with programming logic and the development process
Creating a design before coding can make the development process easier
The 'First Design Then Code' approach allows developers to focus more on technical problems and functionalities
A simple 7-step process has been developed to guide beginner web developers in building websites

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Dev

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My Notes on Model Context Protocol Architecture: A Developer’s Dive

Shrijith Venkatrama, founder of Hexmos, is exploring the Model Context Protocol (MCP) for AI apps' context and tools.
MCP aims to connect AI to various elements like data, user inputs, and workflows using JSON-RPC.
The architecture involves Hosts, Clients, and Servers working together to enhance AI capabilities.
Hosts manage the AI app, while Clients serve as connectors to Servers that provide context and tools.
Servers deliver callable functions, prompts (workflows), and resources to AI applications.
Clients maintain stateful sessions and pass messages between Hosts and Servers in the MCP setup.
MCP's stateful design and terminology like 'sampling' pose challenges for clear interpretation and implementation.
The potential of MCP lies in enhancing AI context, guiding user flows, and enabling modular server interactions.
Implementing MCP could benefit chatbot development, content generation, and real-time data integration for AI models.
Starting with a basic setup and experimenting with JSON-RPC interactions can help developers explore the capabilities of MCP.

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Medium

313

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Virtual Threads Java (Project Loom)

Virtual Threads, introduced as part of Project Loom, is a hot topic in the Java industry.
Virtual Threads in Java provide a powerful feature for concurrency, making it easy to scale up and write simpler code.
Virtual Threads allow millions of threads to perform together, similar to lightweight Bollywood dancers.
Despite being lightweight, Virtual Threads can still use the same old Runnable, Thread, and ExecutorService without any new learning curve.

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Medium

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Git Reflog: The Art of Undoing the Undo

Git reflog is a tool that tracks and explores the history of a repository beyond the standard commit history.
It logs every change to HEAD and other references in a time-based order, providing a detailed view of the repository's evolution.
Running git reflog without arguments shows the history of HEAD, including commits, branch switches, merges, and more.
Git reflog works locally, tracking local operations on the repository and not reflecting changes on remote repositories.

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Medium

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7 Design Patterns Every Developer Should Know

Software design patterns provide tried-and-true ways to solve common problems in software development.
Design patterns make code easier to understand, maintain, and scale.
There are seven design patterns every developer should know.
Using these patterns can significantly improve the design of software systems.

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Medium

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Tech Interviews Are Broken and Useless

Tech interviews are broken and actively harmful, wasting talent and reinforcing biases.
The industry's focus on algorithmic trickery and time-boxed problem solving does not reflect real-life engineering.
LeetCode and similar platforms only test memorization of patterns, not real software engineering skills.
The interview format disproportionately favors certain candidates and discourages innovation and critical thinking.

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Medium

Technology Trends Shaping 2025

Artificial Intelligence (AI) continues to dominate the tech world, with machine learning models becoming more powerful and accessible. In 2025, businesses are integrating AI into customer service, logistics, and decision-making processes.
Quantum computing is transitioning from theoretical to practical applications. IBM and Google are developing quantum processors capable of solving complex problems faster than traditional computers. This has vast potential in cryptography, pharmaceutical research, and financial modeling.
Extended Reality (XR) is going mainstream, revolutionizing fields like education, real estate, and healthcare. From immersive virtual training environments to AR-assisted surgeries, these technologies enhance user engagement and practical efficiency.
The global expansion of 5G networks is enabling faster data transmission, low latency, and seamless connectivity. Meanwhile, research into 6G has begun, promising even greater speeds and more advanced capabilities.

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Medium

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Ethereum’s value might be at its lowest, yet ETH buying doesn’t interest professional traders.

Ether's value has fallen by 44% year-to-date.
Traders show low confidence in a strong recovery for Ether.
Ether futures premium has risen to 4%, below the 5% neutral threshold.
Ether delta skew metric suggests risk-aversion sentiment among investors.

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Dev

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Why Your `.parallelStream()` Might Not Be Parallel at All

When using .parallelStream() in Java, it is expected to achieve parallel execution across multiple threads.
However, there are cases where everything still runs in a single thread and no parallelism is observed.
The reason for this is that the flatMap function forcibly turns a parallel stream back into a sequential stream.
To achieve parallelism, it is recommended to flip the streams by looping over the products instead of users.

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Medium

130

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Ahab: Fragments of a Forgotten Hacker

Ahab, a self-taught hacker, shares his story of becoming a pentest specialist.
Despite preventing disasters, Ahab never received the recognition he deserved.
Feeling exploited and desperate, Ahab sought revenge by hacking his employer's server.
Ahab now faces charges, but speaks out to remind others of the hidden struggles of digital ghosts.

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