Platform and version requirements: JVM (1.0), JS (1.0), Native (1.0)

fun <T> Array<out T>.count(): Int

fun ByteArray.count(): Int

fun ShortArray.count(): Int

fun IntArray.count(): Int

fun LongArray.count(): Int

fun FloatArray.count(): Int

fun DoubleArray.count(): Int

fun BooleanArray.count(): Int

fun CharArray.count(): Int

Returns the number of elements in this array.

Platform and version requirements: JVM (1.0), JS (1.0), Native (1.0)

inline fun <T> Array<out T>.count(
    predicate: (T) -> Boolean
): Int

inline fun ByteArray.count(predicate: (Byte) -> Boolean): Int

inline fun ShortArray.count(
    predicate: (Short) -> Boolean
): Int

inline fun IntArray.count(predicate: (Int) -> Boolean): Int

inline fun LongArray.count(predicate: (Long) -> Boolean): Int

inline fun FloatArray.count(
    predicate: (Float) -> Boolean
): Int

inline fun DoubleArray.count(
    predicate: (Double) -> Boolean
): Int

inline fun BooleanArray.count(
    predicate: (Boolean) -> Boolean
): Int

inline fun CharArray.count(predicate: (Char) -> Boolean): Int

inline fun <T> Iterable<T>.count(
    predicate: (T) -> Boolean
): Int

@ExperimentalUnsignedTypes inline fun UIntArray.count(
    predicate: (UInt) -> Boolean
): Int

@ExperimentalUnsignedTypes inline fun ULongArray.count(
    predicate: (ULong) -> Boolean
): Int

@ExperimentalUnsignedTypes inline fun UByteArray.count(
    predicate: (UByte) -> Boolean
): Int

@ExperimentalUnsignedTypes inline fun UShortArray.count(
    predicate: (UShort) -> Boolean
): Int

Returns the number of elements matching the given predicate.

Platform and version requirements: JVM (1.0), JS (1.0), Native (1.0)

fun <T> Iterable<T>.count(): Int

fun <T> Collection<T>.count(): Int

Returns the number of elements in this collection.

Platform and version requirements: JVM (1.0), JS (1.0), Native (1.0)

fun <K, V> Map<out K, V>.count(): Int

Returns the number of entries in this map.

Platform and version requirements: JVM (1.0), JS (1.0), Native (1.0)

inline fun <K, V> Map<out K, V>.count(
    predicate: (Entry<K, V>) -> Boolean
): Int

Returns the number of entries matching the given predicate.