isBlank

expect fun CharSequence.isBlank(): Boolean

actual fun CharSequence.isBlank(): Boolean

Returns true if this string is empty or consists solely of whitespace characters.

Samples

import samples.*
import java.util.Locale
import kotlin.test.*
fun main() { 
   //sampleStart 
   fun validateName(name: String): String {
    if (name.isBlank()) throw IllegalArgumentException("Name cannot be blank")
    return name
}

assertPrints(validateName("Adam"), "Adam")
assertFails { validateName("") }
assertFails { validateName("  \t\n") } 
   //sampleEnd
}

actual fun CharSequence.isBlank(): Boolean

Returns true if this string is empty or consists solely of whitespace characters.

Samples

import samples.*
import java.util.Locale
import kotlin.test.*
fun main() { 
   //sampleStart 
   fun validateName(name: String): String {
    if (name.isBlank()) throw IllegalArgumentException("Name cannot be blank")
    return name
}

assertPrints(validateName("Adam"), "Adam")
assertFails { validateName("") }
assertFails { validateName("  \t\n") } 
   //sampleEnd
}