CODEWITHSUNDEEP
scala
Foo L
Foo L

Reputation: 11137

scala testing values of against different types

Sorry for the newbie question. Is there an equivalent scala idiom to Python code where I can test for a value of different types?

  if value in ['true', True, "1", 1]:
    ret_value = True
  elif value in ['false', False, "0", 0]:
    ret_value = False

Upvotes: 2

Views: 67

Answers (2)

Ben Reich
Ben Reich

Reputation: 16324

Idiomatic Scala generally avoids variables that can be of any type, and so most Scala programmers would avoid this situation. It does come up once in a while, though. You could do:

val truthies = Set(true, 1, "1", "true") // Set[Any], a type that would generally be avoided
truthies("true") //true
truthies(1) //true
truthies("foo") //false

Upvotes: 2

Daniel Langdon
Daniel Langdon

Reputation: 5999

I don't think so. It would not make a lot of sense, since your value variable has a fixed type. As such, 3 out of your 4 possible values will never work, and the compiler knows it.

That said, if you have a set of possible values of the same type, you can always use List(1, 2, 3, 4).contains(value)

The real beauty of a strongly typed language is that it make a whole category of errors impossible! So you don't need to code that defensively.

Upvotes: 2

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