Since he was a kid, user NXTBoy has been interested in building. An award-winning robotics builder by the time he was a teenager, he’s also made some innovative games and services for ROBLOX, including an Exchange Statistics website that tracks the exchange rates of ROBLOX currency.

The website is essentially a chart that updates itself. NXTBoy originally launched it in 2008 as an excuse to re-learn SQL (Structured Query Language), a special-purpose programming language.“Basically, I created a cron-job that scrapes the currency exchange page every two hours,” recalls NXTBoy. “I used XPath selectors to extract info, and stored the data in my SQL database.”

Continue reading