Method: ActionDispatch::Flash::FlashHash#keep

Defined in:
actionpack/lib/action_dispatch/middleware/flash.rb

#keep(k = nil) ⇒ Object

Keeps either the entire current flash or a specific flash entry available for the next action:

flash.keep            # keeps the entire flash
flash.keep(:notice)   # keeps only the "notice" entry, the rest of the flash is discarded



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# File 'actionpack/lib/action_dispatch/middleware/flash.rb', line 250

def keep(k = nil)
  k = k.to_s if k
  @discard.subtract Array(k || keys)
  k ? self[k] : self
end