Business Day Math Is Harder Than You Think
Weekends, holidays, and country-specific rules make working day calculations surprisingly tricky. Here's what to watch for.
Comprehensive guides for working with various APIs and web services.
Weekends, holidays, and country-specific rules make working day calculations surprisingly tricky. Here's what to watch for.
Expired certs, mismatched domains, weak encryption. A practical checklist for catching SSL issues before your users do.
DNS problems cause connection failures and email issues. Learn how to use DNS lookups to diagnose problems faster.
Exchange rates change constantly. Learn how to handle currency conversion in applications with accuracy and reliability.
WHOIS data reveals domain ownership, age, and infrastructure. Use it for lead qualification, research, and fraud detection.
Email validation beyond regex. Learn how to verify deliverability without rejecting legitimate users.
IP geolocation has limits. Learn when it works, when it fails, and how to handle edge cases in your applications.
Remember when QR codes were a punchline? Now they're everywhere. Here's why this time it stuck.
Every HTTP request announces who you are. Here's what's in that string and what you can do with it.
Validating phone numbers seems simple until you try it. Here's what makes it surprisingly complex.
Air quality affects millions of users. Here's how to integrate environmental health data meaningfully.
Sentiment analysis is powerful but often misused. Here's how to use sentiment data effectively.
Rate limits exist for a reason. Here's how to understand them, avoid hitting them, and handle them gracefully when you do.
URLs, WiFi passwords, contact cards, payment links—QR codes do more than you'd expect. Here's how to generate and read them programmatically.
Skip the theory. Here's when to use REST endpoints and when GraphQL actually makes sense.
Compare WebSockets and Server-Sent Events for real-time data. Learn when to use each and how to implement them.
Learn how to convert addresses to coordinates and vice versa using geocoding APIs. Practical examples and best practices.
Understand how token-based billing works for APIs. Learn credits, usage tracking, and how to optimize your API costs.