none

Returns true if the char sequence has no characters.

Samples

import samples.*
import kotlin.test.*
fun main() { 
   //sampleStart 
   val emptyList = emptyList<Int>()
assertTrue(emptyList.none())

val nonEmptyList = listOf("one", "two", "three")
assertFalse(nonEmptyList.none()) 
   //sampleEnd
}

inline fun CharSequence.none(predicate: (Char) -> Boolean): Boolean

Returns true if no characters 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.none { isEven(it) })
assertFalse(zeroToTen.none(isEven))

val odds = zeroToTen.map { it * 2 + 1 }
assertTrue(odds.none { isEven(it) })

val emptyList = emptyList<Int>()
assertTrue(emptyList.none { true }) 
   //sampleEnd
}