CODEWITHSUNDEEP
scala
Francisco Teixeira
Francisco Teixeira

Reputation: 35

How can I initialise an AnyVal value on scala?

how can I initialise and AnyVal value? If I initialise like this it shows 'Block cannot contain declarations'

var value: AnyVal

If I initialize like this it shows 'Required: Anyval, Found: Null'

var value: AnyVal = null

Can someone help me please? Thank you.

EDIT

I tried using the Option[AnyVal] and it works perfectly. Thank you for the help.

Upvotes: 0

Views: 171

Answers (2)

gianluca aguzzi
gianluca aguzzi

Reputation: 1734

You can initialise it using _, like:

var value: AnyVal = _

BTW, it is better to use some Wrapper type, that expresses the absence of the value. In Scala it is possible using Option like:

var value: Option[AnyVal] = None

Upvotes: 1

Sandeep Kota
Sandeep Kota

Reputation: 76

First of all, I highly suggest using val over var and secondly why do you want to initialise to a default value and change it later? Almost many use cases can be achieved using immutability in Scala (which is good). If you could share your use case/example which is insisting you to use mutability, would be happy to take a look at it.

And it is always better to refrain from using null and use Option to represent absence, it avoids NullPointerExceptions

Upvotes: 0

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