scala create val for outer scope

Consider following object,

    object A {
        def setX(x:Int) = {
            val x1 = x
        }

        def getx() = x1
    }

If I create val x1 inside setX that's scope will be the method setX. what I really want to do is create a val outside the me开发者_开发知识库thod and assign the value inside the method. Is it impossible without using var, or is there any way to do it?

Please send me an example if you can.

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That is sort of the difference between val ("readonly") and var.

So no: not possible.

If the problem (not the desired solution) is explained more, there might be alternative approaches.

Happy coding.

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Its hard to tell, what you actually want to achieve, but often converting your setX method does the trick:

   def setX(x:Int) = {
       x
   }

   val x1 = setX(x)

or you could create a SetOnce class which holds a value and allows to set it exactly once ...