Curious engineer writing about things that work, fail, and unexpectedly scale.

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We might earn a commission if you make a purchase through one of the links. The McClatchy Commerce Content team, which is independent from our newsroom, oversees this content. This article has ...

SQL Case Files is a free interactive SQL game that teaches SQL through crime-solving challenges. Learn SQL online with hands-on puzzles, realistic datasets, SQL practice exercises, and a full ...

HackerRank is a tech company that focuses on competitive programming challenges for both consumers and businesses, where developers compete by trying to program according to provided specifications.