cantin

file = File.join(Rails.root, 'log/markdown.log')
File.new(file, 'w+') unless File.exist?(file)
logger = Logger.new(file)
logger.info("#{Time.now}: Share##{_id}'s price is from #{latest_price} to #{new_price}")
logger.close

cantin

args **/*.txt
argsdo %s/oldword/newword/gc

/oldword/newword/# to disable the ignorecase options

cantin

namespace :book_item do
  task :free_all_if_due => :environment do
    Book.free_book_items_if_due
    puts 'Free the due book_item successfully'
  end 
end

cantin

namespace :delayed_job do
  task :setup do
    puts capture %Q(cd #{deploy_to}/current/ && RAILS_ENV=production script/rails runner 'Delayed::Backend::Mongoid::Job.create_indexes')
  end

  task :start do
    puts capture %Q(cd #{deploy_to}/current/ && RAILS_ENV=production script/delayed_job start)
  end

  task :stop do