CODEWITHSUNDEEP
scala
S. Takano
S. Takano

Reputation: 313

Scala: Initialization of var in class

I am beginner of Scala, I try to make a class and use of it, which class has variables (var) and some processing (in def). I write class like as follows;

class Example() {
    var ExampleVar0 = 0
    var ExampleVar1 = 0

    def ExampleProcessing(_arg0: Int, _arg1: Int) : (Int, Int) = {
        ExampleVar0 = _arg0 + 1
        ExampleVar1 = _arg1 - 1
        (ExampleVar0*2, ExampleVar1/2)
    }
}

I want to initialize ExampleVar* and to keep and update the value. I use the class in other class;

var result0
var result1
val exp = Example()
exp.ExampleProcessing(5, 6)(result0, result1)

The both of result0 and result1 is zero, seems always write with zero by statement of the var ExampleVar0 = 0. I checked the value of the var (println(exp.ExampleVar0.toString)) then it is always zero. I might misunderstand about initialization of var.

Could you please point out where is my misunderstand and how to solve it?

Upvotes: 0

Views: 46

Answers (1)

Tim
Tim

Reputation: 27421

You appear to be using result0 and result1 as method parameters, which does not look right. Try this:

val exp = Example()
val (result0, result1) = exp.ExampleProcessing(5, 6)

In this case the var does not seem to be relevant or necessary, but I will give the usual warning that it is best to avoid var and use immutable data structures.

Upvotes: 1

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