ifBlank

inline fun <C : CharSequence, R, R> C.ifBlank(defaultValue: () -> R): R(source)

Returns this char sequence if it is not empty and doesn't consist solely of whitespace characters, or the result of calling defaultValue function otherwise.

Since Kotlin

1.3

Samples



import java.util.Locale


import kotlin.test.*
fun main() { 
   //sampleStart 
   val blank = "    "

val blankOrNull: String? = blank.ifBlank { null }
println(blankOrNull) // null

val blankOrDefault = blank.ifBlank { "default" }
println(blankOrDefault) // default

val nonBlank = "abc"
val sameString = nonBlank.ifBlank { "def" }
println("nonBlank === sameString is ${nonBlank === sameString}") // true 
   //sampleEnd
}