RBT Study App Prioritizes Error Analysis Over Scores to Build Deeper Understanding

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A developer named Mohammed has built an Android app called RBT Practice Questions 2026, designed to help learners prepare for the Registered Behavior Technician certification exam. Rather than focusing on scores, the app is built around diagnosing why a learner got a question wrong, offering rationales for every answer option including distractors. The app includes 1,500 original questions, 12 timed 85-question mock exams, 58 lessons, 600 flashcards, and an offline mistake-review system. A delayed retest feature is built in to promote durable understanding rather than short-term recognition. The app organizes content across the six domains of the BACB's RBT Test Content Outline, 3rd edition, and directs users to official BACB resources for certification requirements.

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Developer Builds CheckForge, an Uptime Monitoring SaaS Using Fastify and Cloudflare

A developer has built CheckForge, an uptime monitoring platform designed to track websites, APIs, and SSL certificates in real time. The platform was created over several months as a hands-on exercise in building a production-ready SaaS beyond typical portfolio projects. CheckForge uses Cloudflare Workers to execute health checks, Supabase to store results, and supports alerts via Email, Slack, Discord, and Webhooks. When a failure is detected, the system automatically creates an incident and dispatches notifications through the user's configured channels. The project is live at checkforge.in, with multi-location monitoring among the features planned for future development.

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ProgrammingDEV Community ·

JavaScript Type Coercion: Key Rules Behind Tricky Interview Output Questions

JavaScript type coercion frequently trips up developers in technical interviews, particularly with expressions involving arrays, objects, and special values like NaN. When the + operator is used with arrays or objects, JavaScript converts both sides to primitives via ToPrimitive, defaulting to string concatenation if either result is a string. For example, [] + [] produces an empty string, while [] + {} yields "[object Object]" because arrays stringify to "" and plain objects to "[object Object]". A bare {} + [] at statement level can be parsed as an empty block followed by unary +[], evaluating to 0, whereas wrapping it in parentheses forces object interpretation and returns "[object Object]". NaN is never equal to itself under IEEE-754, making both NaN === NaN and NaN == NaN return false, so developers should use Number.isNaN() or Object.is() for reliable NaN checks.

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ProgrammingDEV Community ·

How Emotional Intelligence Can Make You a Faster, Calmer Debugger

A piece published on DEV Community argues that Emotional Intelligence (EQ) is an underutilized factor in effective software debugging, often determining whether a bug takes 20 minutes or several hours to fix. The article identifies common emotional pitfalls developers face, including frustration-driven confirmation bias, imposter syndrome triggered by stubborn bugs, and defensive reactions to critical tickets. It recommends practical EQ techniques such as taking short breaks to reset focus, reframing problems as objective facts rather than personal failures, and asking for help early as a deliberate efficiency strategy. The piece also highlights that during production outages, the calmest developer in the room tends to make better decisions and reduce downtime. The central takeaway is that addressing emotional reactivity before diving deeper into code can significantly sharpen a developer's logical problem-solving ability.

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ProgrammingDEV Community ·

Developer open-sources production-ready MCP server template for Claude and Cursor

A developer has released an open-source TypeScript/Node.js template on GitHub designed to simplify building Model Context Protocol (MCP) servers for AI agents like Claude Desktop and Cursor. The template addresses common shortcomings in typical MCP server scripts, including missing input validation, structured logging, and cumbersome deployment due to bundled node_modules. It includes Zod schema validation, Vitest testing, pino logging routed to stderr, and an esbuild setup that compiles everything into a single deployable file. Developers can extend the template by adding tools, resources, and prompts following a consistent schema-definition-handler pattern. The project is MIT licensed and includes a GitHub Actions workflow that automatically publishes releases to both npm and the MCP Registry.

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