Most popular resources from the past week
Create dynamic array formulas using FILTER, SORT, UNIQUE, and SEQUENCE for advanced data manipulation.
Create a type-safe state machine with transitions, guards, actions, and visualization support using XState patterns.
Rate and improve fictional API designs. Identify anti-patterns, suggest improvements, and learn REST best practices through gameplay.
Write the shortest possible code to solve each challenge. Compete for the fewest characters while maintaining correctness.
Build CI/CD pipelines by connecting stages in the correct order. Handle dependencies, parallelism, and failure scenarios.
Compete against Copilot to solve algorithm challenges. Race to implement sorting, searching, and graph algorithms within time limits.
Practice resolving increasingly complex merge conflicts in a safe sandbox. Learn strategies for handling real-world conflicts.
Build Docker configurations to meet specific requirements. Optimize image sizes, fix networking issues, and manage multi-container setups.
Find and fix intentionally planted bugs in code snippets. Score points based on speed and accuracy of your debugging skills.
Solve crossword-style puzzles where clues are regular expressions. Test your regex mastery with increasingly complex patterns.
Solve a murder mystery by writing SQL queries to investigate clues in a relational database. Each correct query reveals new evidence.
Manage memory allocation in a visual simulator. Handle garbage collection, prevent leaks, and optimize memory usage patterns.
Navigate through git repository puzzles using only git commands. Recover lost commits, resolve conflicts, and find hidden messages.
Recreate visual targets using only CSS. Score based on pixel accuracy and code efficiency against increasingly complex designs.
Interactively explore binary search through visual puzzles. Predict algorithm behavior and optimize search strategies.
Find accessibility violations in web page screenshots and code. Learn WCAG guidelines through hands-on detection challenges.
Match HTTP status codes to their correct descriptions and usage scenarios. Master the full range from 1xx to 5xx responses.
Identify design patterns used in code samples. Learn when to apply Factory, Observer, Strategy, and other patterns through practice.
Craft the perfect prompts to get Copilot to generate specific code outputs. Learn prompt engineering through iterative refinement.
Predict TypeScript type inference results for complex generic types. Master discriminated unions and conditional types.
Solve puzzles about TCP/IP, HTTP, WebSocket, and other protocols. Understand handshakes, headers, and data flow through interactive challenges.
Build and manipulate data structures interactively. Watch trees balance, stacks grow, and graphs traverse in real-time puzzles.
Review randomly generated code snippets and identify issues. Score points for catching bugs, security flaws, and style violations.
Deploy applications to a simulated Kubernetes cluster. Handle scaling, rolling updates, and incident response scenarios.
AI tools guide for developers: ChatGPT, Claude, Gemini, Grok, Cursor, GitHub Copilot, prompt engineering, AI agents and productivity.
A Microsoft AI engineering prompt-building tool for Azure OpenAI, Microsoft Copilot, GitHub Copilot, Microsoft Foundry, RAG applications, and AI solution development.
A Windows-friendly AI agent coding and prompting workbench for Codex, Claude Code, Cursor, Antigravity, Copilot, MCP, safe GitHub workflows, prompt engineering, and student-friendly agentic coding experiments.

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