Ruby: toggle a boolean inline? -

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how can opposite of boolean in ruby (i know converted 0/1) using method inline?

say have given instance:

class vote    def return_opposite     self.value   end  end

which doesn't anything, can't seem find method simple , short opposite() or like. exist , i'm not looking @ right place in docs? if 1 doesn't exist there short ternary toggle 1 => 0 or 0 => 1?

i use 

@object.boolean = !@object.boolean

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