Marks the entire flash or a single flash entry to be discarded by the end of the current action:

flash.discard              # discard the entire flash at the end of the current action
flash.discard(:warning)    # discard only the "warning" entry at the end of the current action

Source Code

# File action_controller/flash.rb, line 102
def discard(k = nil)
  use(k)
end