isBlank
Returns true
if this char sequence is empty or consists solely of whitespace characters according to Char.isWhitespace.
import java.util.Locale
import kotlin.test.*
fun main(args: Array<String>) {
//sampleStart
fun validateName(name: String): String {
if (name.isBlank()) throw IllegalArgumentException("Name cannot be blank")
return name
}
println(validateName("Adam")) // Adam
// validateName("") // will fail
// validateName(" \t\n") // will fail
//sampleEnd
}