Rufus-scheduler is an in-process, in-memory job scheduler for Ruby, supporting `at`, `in`, `every`, and `cron` expressions. Users instantiate a `Rufus::Scheduler` and define jobs, for example, `scheduler.in '3s' do puts 'Hello' end`. It doesn't persist schedules, meaning jobs disappear when the process stops.
Provides in-process job scheduling capabilities for Ruby applications.
Developers needing to schedule time-based tasks like delayed actions, recurring events, or cron jobs directly within a Ruby application.