contains
@DeprecatedSinceKotlin
(
"1.4"
,
"1.6"
,
"1.7"
)
operator
fun
FloatArray
.
contains
(
element
:
Float
)
:
Boolean
(source)
@DeprecatedSinceKotlin
(
"1.4"
,
"1.6"
,
"1.7"
)
operator
fun
DoubleArray
.
contains
(
element
:
Double
)
:
Boolean
(source)
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.
import kotlin.test.*
import java.util.*
fun main(args: Array<String>) {
//sampleStart
val map: Map<String, Int> = mapOf("x" to 1)
println("map.contains(\"x\") is ${map.contains("x")}") // true
println("\"x\" in map is ${"x" in map}") // true
println("map.contains(\"y\") is ${map.contains("y")}") // false
println("\"y\" in map is ${"y" in map}") // false
//sampleEnd
}