This post shows examples of codes to check if certain values exists in a list.

Requirements

IntelliJ IDEA Ultimate 2016.3
- The Community Edition may be enough but we have not tried it.
Kotlin Version 1.1
Windows 10 Enterprise

Check if String is in a list

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package exercise01

fun main(args: Array<String>) {

    val aphabetList: List<String> = listOf("A", "B", "C", "D", "E", "F")

    val findValue: String = "D"

    val found: Boolean = aphabetList.contains(findValue)

    println("Found ${findValue} yet? " + found)

}

package exercise01

fun main(args: Array<String>) {

val aphabetList: List<String> = listOf("A", "B", "C", "D", "E", "F")

val findValue: String = "D"

val found: Boolean = aphabetList.contains(findValue)

println("Found ${findValue} yet? " + found)

}

Outputs:

Found D yet? true

1	Found D yet? true

Check if array of Strings is in a list

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package exercise01

fun main(args: Array<String>) {

    val aphabetList: List<String> = listOf("A", "B", "C", "D", "E", "F")

    val findValues: Array<String> = arrayOf("D", "A")

    val valList = findValues.toList()

    val found: Boolean = aphabetList.containsAll(valList)

    println("Found ${valList} yet? " + found)

}