EraCode practice
Browse community-shared practice across technologies. These pages are teasers only — skill maintenance still happens when you attempt the full challenge inside EraCode.
Practice wiring Sequelize into request flow: start a transaction in middleware, make it available to downstream handlers, and ensure it commits/rolls back correctly.
Practice a small Sequelize optimization: make `findAndCountAll` generate a leaner count query when you have includes that can inflate work.
Practice R package lifecycle/initialization by wiring a one-time setup hook correctly and reasoning about when it runs.
Practice a small but nuanced environment/config pattern in R: reliably reading a configuration value from an environment variable while providing a deterministic default.
Quick check + one small coding gap on module/import patterns: choosing a strategy for optional dependencies and implementing a lazy import fallback.