Create Agent Skills in Simple Steps
Agent skills extend Claude Code and Codex with custom capabilities through simple markdown files and scripts.
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Setup Postgres Database in Docker Container for Development
Quick guide to setting up a PostgreSQL database in a Docker container for local development with docker-compose.
Share pages and technical docs with ChatGPT, Claude, and v0 using URL queries
Share the current page with AI assistants like ChatGPT, Claude, and v0 using simple URL query strings for a single-click hand-off experience.
Building First Chrome Extension
A comprehensive guide to building your first Chrome extension, covering manifest.json, content scripts, background scripts, popup scripts, and more.
The [err, data] Pattern: A Cleaner Approach to Error Handling in TypeScript
Learn the [err, data] pattern inspired by Go's error handling for cleaner async error handling in TypeScript with better type safety.
How to extend AuthJS User type in NextJS using TypeScript
Extend the User type of AuthJS using TypeScript's Module Augmentation to add custom fields like role, firstName, and lastName.
Validate environment variables with type safety using Zod
Use Zod to validate environment variables with type safety in TypeScript and extend the global ProcessEnv interface.
Streaming data in Next.js using API route
Learn how to stream data in Next.js using the TransformStream API and server-sent events for real-time data updates.
JavaScript's Defaults: || vs. ??
Understanding the difference between Logical OR (||) and Nullish Coalescing (??) operators in JavaScript for setting default values.
List of Useful Python Tricks for Solving Coding Questions
Useful Python tricks for coding interviews including Counter, reversed, defaultdict, deque, and enumerate with examples.
Python: useful built-in Functions
A reference table of commonly used Python built-in functions including abs, chr, divmod, len, max, min, ord, range, reversed, sorted, and sum.
How to mock express middleware in Jest
Learn how to mock Express middleware functions in Jest tests using jest.mock.
Mocking modules in Jest.js
Complete guide to mocking modules in Jest for both CommonJS and ES Module syntax, including named imports, default exports, and partial mocks.
Microservices and Custom exception filter in NestJS
Create custom exception filters in NestJS to handle RpcException errors thrown by microservices with better control and customization.
Avoid bugs when using Array fill()
Array.fill in JavaScript passes objects by reference, not by value. Learn how to avoid common bugs when using this method.
Use Hex color strings (#808080) instead of ARGB integer (0xFF808080)
Extend the Color class in Flutter to use hex color strings instead of ARGB integers.
How to create Python virtual environment
Step-by-step guide to creating and using Python virtual environments with venv for isolated package management.
How to write http response to a file
Write or append HTTP response text to a file in Python using the requests library.
How to add background image to a container in Flutter?
Use decoration property of container with BoxDecoration and ImageProvider to add background images in Flutter.
How to create a private fork of a public repo on GitHub?
Step-by-step guide to creating a private fork of a public GitHub repository using git clone --bare and git push --mirror.
How to get any day of the week in Dart and Flutter
Use DateTime's weekday getter to get any day of the week in Dart and Flutter.
How to use multiple text styles in Flutter
Use Flutter's built-in RichText widget to display text with multiple different styles.
How to get complete path to a file in terminal
Use readlink -f to get the complete absolute path to a file in the terminal.
How to remove all routes from the Navigator in Flutter
Remove all routes from the Navigator stack in Flutter, useful for implementing logout functionality.
How to add border to a container in Flutter
Add a border to a container in Flutter using BoxDecoration with Border.all.
How to undo last commit message in Git
Amend the most recent commit message in Git and push the changes to a remote branch.