#10. positive? method
3.0.4 :001 > 0.positive?
=> false
3.0.4 :002 > 1.positive?
=> true
3.0.4 :003 > -1.positive?
=> false
#25 Ruby on Rails application performance and security tools
Security - rack-attack gem Brakeman gem Performance tools - bullet rails_best_practice rubycritic, rubocop rack-mini-profiler spring, memory_profiler Appsignal(paid) New Relic(paid) Bullet gem(N+1 query) rails_best_practice rubycritic rubocop brakeman rack-mini-profiler spring memory_prof
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