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kotlindoublenaninfinitydefensive-programming

Kotlin: Condition that double-value is a "normal" number

How can I test if a value of type Double in Kotlin is not Double.POSITIVE_INFINITY, Double.NEGATIVE_INFINITY, Double.NaN or some other special value?

I'd like to have something like require(Double.isNormal(x))

Solution

  • https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/is-finite.html

    require(x.isFinite()) is what you need.