all

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

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

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

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

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

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

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

inline fun BooleanArray.all(predicate: (Boolean) -> Boolean): Boolean

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

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

Returns true if all elements match the given predicate.

Samples

import samples.*
import kotlin.test.*
fun main() { 
   //sampleStart 
   val isEven: (Int) -> Boolean = { it % 2 == 0 }
val zeroToTen = 0..10
assertFalse(zeroToTen.all { isEven(it) })
assertFalse(zeroToTen.all(isEven))

val evens = zeroToTen.map { it * 2 }
assertTrue(evens.all { isEven(it) })

val emptyList = emptyList<Int>()
assertTrue(emptyList.all { false }) 
   //sampleEnd
}

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

Returns true if all entries match the given predicate.

Samples

import samples.*
import kotlin.test.*
fun main() { 
   //sampleStart 
   val isEven: (Int) -> Boolean = { it % 2 == 0 }
val zeroToTen = 0..10
assertFalse(zeroToTen.all { isEven(it) })
assertFalse(zeroToTen.all(isEven))

val evens = zeroToTen.map { it * 2 }
assertTrue(evens.all { isEven(it) })

val emptyList = emptyList<Int>()
assertTrue(emptyList.all { false }) 
   //sampleEnd
}

@ExperimentalUnsignedTypes

inline fun UIntArray.all(predicate: (UInt) -> Boolean): Boolean

@ExperimentalUnsignedTypes

inline fun ULongArray.all(predicate: (ULong) -> Boolean): Boolean

@ExperimentalUnsignedTypes

inline fun UByteArray.all(predicate: (UByte) -> Boolean): Boolean

@ExperimentalUnsignedTypes

inline fun UShortArray.all(predicate: (UShort) -> Boolean): Boolean

Returns true if all elements match the given predicate.

Since Kotlin

1.3

Samples

import samples.*
import kotlin.test.*
fun main() { 
   //sampleStart 
   val isEven: (Int) -> Boolean = { it % 2 == 0 }
val zeroToTen = 0..10
assertFalse(zeroToTen.all { isEven(it) })
assertFalse(zeroToTen.all(isEven))

val evens = zeroToTen.map { it * 2 }
assertTrue(evens.all { isEven(it) })

val emptyList = emptyList<Int>()
assertTrue(emptyList.all { false }) 
   //sampleEnd
}