IntroductionIn December 2025, Zscaler ThreatLabz discovered a campaign linked to APT37 (also known as ScarCruft, Ruby Sleet, and Velvet Chollima), which is a DPRK-backed threat group. In this campaign ...
ActiveRecord is often learned by memorizing methods, not by understanding SQL behavior. This playground encourages experimentation and observation. exercises/level_1_basic_queries.md exercises/level_2 ...
This is a Ruby testing/reference project, so it follows standard Ruby gem conventions: lib/ for library code organized by concern, spec/ for RSpec tests, app/ for the system under test, and scripts/ ...
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