isBlank

expect fun CharSequence.isBlank(): Boolean(source)

actual fun CharSequence.isBlank(): Boolean(source)

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

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
}

println(validateName("Adam")) // Adam
// validateName("") //  will fail
// validateName("  \t\n") //  will fail 
   //sampleEnd
}

actual fun CharSequence.isBlank(): Boolean

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

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
}

println(validateName("Adam")) // Adam
// validateName("") //  will fail
// validateName("  \t\n") //  will fail 
   //sampleEnd
}