Rails irb or script/console tips in one glimpse

Summarize most basic tips of using script/console here:

• # script/console (note: start it)
• # script/console production (note: start it with production environment)
• # script/console -s (note: run in sandbox, all change to data records will rollback)
• >>$LOAD_PATH (note: see the load_path of current environment)
• >>reload! (note: reload the environment)
• >>clear
• >>$ (note: use TAB key to see all environment variables)
• >>Str (note: use TAB key to auto complete)
• >>@hello = "Hello word!" (note: define variable)
• >>@hello = Object.new (note: define variable)
• >>@order = Order.find(1) (note: get an order object, order.rb should be in one of app models)
• >>app.get "/articles/1234" (note: run controller by route path)
• >>app.post "/login", {:login => "xiaobozz", :password => "12345"}
• >>helper.image_tag "logo.gif" (note: run any method of actionview helpers)
• >>y @order (note: YAML style output)

The best way to get familiar with these tips is to use them now :-)