7 articles
A dashboard that compares sources refreshing at different times should show a common cutoff, the last hour all of them have complete. A fictional day, with ads complete through 3 p.m., sales through 1 p.m. and web traffic through 2 p.m., shows how a return metric otherwise mixes three clocks.
A small team can have a room-booking app built to its own measure with Cloudflare Pages, a D1 database and a coding agent. This one replaced a cowork's physical whiteboard for its two meeting rooms, where checking availability meant walking over to read it, and put that information on the phone.
Pointing a custom domain at GitHub Pages through Cloudflare comes down to a few DNS records, a decision about www, and HTTPS with a real certificate. This walkthrough follows gonor.me from an empty DNS table to a working site, with the wrong turns left in.
An API is the interface that delivers data to your code, and analysts already use them when pulling Fed rates, Banxico exchange rates or World Bank life expectancy. Understanding it lets you diagnose failures, fix slow queries and build custom tools; the project shows this with real data and interactive labs.
A B-tree keeps data sorted in wide, shallow nodes, so a lookup among 500 million records can touch only about 9 nodes; PostgreSQL, MySQL and SQLite use it for their indexes. Understanding the structure changes how you design queries and judge the real cost of a lookup.
Next.js with Recharts is a serious alternative to Power BI and Tableau when a report must ship as a finished, fast, mobile-friendly product instead of a workspace artifact. Two dashboards, an Airbnb CDMX market analysis and an Olist e-commerce cohort study, test that claim.
Three interactive SVG visualizations let you manipulate the sin(x)/x limit, the derivative of sine and Euler's formula to see why each holds. They matter in actuarial and financial work: sin(θ) ≈ θ for small angles underpins the linear approximations used in sensitivities.