kotlin-stdlib/kotlin.collections/all

all

inline fun <T> Array<out T>.all(predicate: (T) -> Boolean): Boolean(source)
inline fun ByteArray.all(predicate: (Byte) -> Boolean): Boolean(source)
inline fun ShortArray.all(predicate: (Short) -> Boolean): Boolean(source)
inline fun IntArray.all(predicate: (Int) -> Boolean): Boolean(source)
inline fun LongArray.all(predicate: (Long) -> Boolean): Boolean(source)
inline fun FloatArray.all(predicate: (Float) -> Boolean): Boolean(source)
inline fun DoubleArray.all(predicate: (Double) -> Boolean): Boolean(source)
inline fun BooleanArray.all(predicate: (Boolean) -> Boolean): Boolean(source)
inline fun CharArray.all(predicate: (Char) -> Boolean): Boolean(source)
inline fun <T> Iterable<T>.all(predicate: (T) -> Boolean): Boolean(source)

Returns true if all elements match the given predicate.

Since Kotlin

1.0

Samples

import kotlin.test.*

fun main() { 
   //sampleStart 
   val isEven: (Int) -> Boolean = { it % 2 == 0 }
val zeroToTen = 0..10
println("zeroToTen.all { isEven(it) } is ${zeroToTen.all { isEven(it) }}") // false
println("zeroToTen.all(isEven) is ${zeroToTen.all(isEven)}") // false

val evens = zeroToTen.map { it * 2 }
println("evens.all { isEven(it) } is ${evens.all { isEven(it) }}") // true

val emptyList = emptyList<Int>()
println("emptyList.all { false } is ${emptyList.all { false }}") // true 
   //sampleEnd
}
inline fun <K, V> Map<out K, V>.all(predicate: (Map.Entry<K, V>) -> Boolean): Boolean(source)

Returns true if all entries match the given predicate.

Since Kotlin

1.0

Samples

import kotlin.test.*

fun main() { 
   //sampleStart 
   val isEven: (Int) -> Boolean = { it % 2 == 0 }
val zeroToTen = 0..10
println("zeroToTen.all { isEven(it) } is ${zeroToTen.all { isEven(it) }}") // false
println("zeroToTen.all(isEven) is ${zeroToTen.all(isEven)}") // false

val evens = zeroToTen.map { it * 2 }
println("evens.all { isEven(it) } is ${evens.all { isEven(it) }}") // true

val emptyList = emptyList<Int>()
println("emptyList.all { false } is ${emptyList.all { false }}") // true 
   //sampleEnd
}
@ExperimentalUnsignedTypes
inline fun UIntArray.all(predicate: (UInt) -> Boolean): Boolean(source)
@ExperimentalUnsignedTypes
inline fun ULongArray.all(predicate: (ULong) -> Boolean): Boolean(source)
@ExperimentalUnsignedTypes
inline fun UByteArray.all(predicate: (UByte) -> Boolean): Boolean(source)
@ExperimentalUnsignedTypes
inline fun UShortArray.all(predicate: (UShort) -> Boolean): Boolean(source)

Returns true if all elements match the given predicate.

Since Kotlin

1.3

Samples

import kotlin.test.*

fun main() { 
   //sampleStart 
   val isEven: (Int) -> Boolean = { it % 2 == 0 }
val zeroToTen = 0..10
println("zeroToTen.all { isEven(it) } is ${zeroToTen.all { isEven(it) }}") // false
println("zeroToTen.all(isEven) is ${zeroToTen.all(isEven)}") // false

val evens = zeroToTen.map { it * 2 }
println("evens.all { isEven(it) } is ${evens.all { isEven(it) }}") // true

val emptyList = emptyList<Int>()
println("emptyList.all { false } is ${emptyList.all { false }}") // true 
   //sampleEnd
}