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Kotlin Sealed Class

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SAMER SAEID answered on October 23, 2021 Popularity 9/10 Helpfulness 1/10

answer Kotlin Sealed Class

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Kotlin Sealed Class

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sealed class Expr
class Const(val value: Int) : Expr()
class Sum(val left: Expr, val right: Expr) : Expr()
object NotANumber : Expr()


fun eval(e: Expr): Int =
        when (e) {
            is Const -> e.value
            is Sum -> eval(e.right) + eval(e.left)
            NotANumber -> java.lang.Double.NaN
        }

Popularity 9/10 Helpfulness 1/10 Language kotlin

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Tags: kotlin sealed-class

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Contributed on Jun 14 2022

SAMER SAEID

0 Answers Avg Quality 2/10

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Kotlin Sealed Classes

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class Expr
class Const(val value: Int) : Expr
class Sum(val left: Expr, val right: Expr) : Expr

fun eval(e: Expr): Int =
        when (e) {
            is Const -> e.value
            is Sum -> eval(e.right) + eval(e.left)
            else ->
                throw IllegalArgumentException("Unknown expression")
        }

Popularity 9/10 Helpfulness 1/10 Language kotlin

Source: Grepper

Tags: kotlin ko

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Contributed on Jun 14 2022

SAMER SAEID

0 Answers Avg Quality 2/10

sealed class in kotlin example

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sealed interface Expr

sealed class MathExpr(): Expr

data class Const(val number: Double) : MathExpr()

data class Sum(val e1: Expr, val e2: Expr) : MathExpr()

object NotANumber : Expr

Popularity 9/10 Helpfulness 1/10 Language java

Source: tedblob.com

Tags: java

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Contributed on Oct 23 2021

Smoggy Snail

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sealed class in kotlin example

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sealed class Message {
    abstract val messageId: String
}
data class Track(val event: String, override val messageId: String): Message()

Popularity 9/10 Helpfulness 1/10 Language java

Source: tedblob.com

Tags: java

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Contributed on Oct 23 2021

Smoggy Snail

0 Answers Avg Quality 2/10

Kotlin Sealed Class

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Kotlin Sealed Class

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Kotlin Sealed Classes

sealed class in kotlin example

sealed class in kotlin example

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