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

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

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

/oldword/newword/# to disable the ignorecase options

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

--export
mysql -u user -p password database_name > export.sql
mysql -u user -p password database_name table_name > export.csv

--import
mysql -u user -p password
source export.sql

cantin

 f = lambda {|x, y=1| puts(x+y) }
f = ->(x, y =1) { puts(x+y) }

cantin

require 'forwardable'

class A
  extend Forwardable

  def initialize
    @arr =  Array.new
  end

  def_delegator :@arr, :push, :add

cantin

> DB_STRUCTURE=db/null_schema.sql rake db:structure:dump


class NullMigration < ActiveRecord::Migration
  def up
    file_data = File.read('db/migrate/null_schema.sql')
    ActiveRecord::Base.connection.execute file_data
  end

  def down

cantin

$ rspec --format MacVimFormatter --color spec

cantin

Due to the rails2.x is not compatible wtih RubyGem > 1.6, need downgrade RubyGem if run rails2.x app

gem uninstall rubygems-update
gem install rubygems-update -v 1.4.2
update_rubygems