contains
Returns true if element is found in the array.
Returns true if element is found in the collection.
Checks if the map contains the given key.
This method allows to use the x in map syntax for checking whether an object is contained in the map.
Samples
import samples.*
import kotlin.test.*
import java.util.*
fun main() {
//sampleStart
val map: Map<String, Int> = mapOf("x" to 1)
assertTrue(map.contains("x"))
assertTrue("x" in map)
assertFalse(map.contains("y"))
assertFalse("y" in map)
//sampleEnd
}