isNullOrEmpty

inline fun CharSequence?.isNullOrEmpty(): Boolean(source)

Returns true if this nullable char sequence is either null or empty.

Since Kotlin

1.1

Samples

import java.util.Locale
import kotlin.test.*

fun main() { 
   //sampleStart 
   fun markdownLink(title: String?, url: String) =
    if (title.isNullOrEmpty()) url else "[$title]($url)"

// plain link
println(markdownLink(title = null, url = "https://kotlinlang.org")) // https://kotlinlang.org

// link with custom title
println(markdownLink(title = "Kotlin Language", url = "https://kotlinlang.org")) // [Kotlin Language](https://kotlinlang.org) 
   //sampleEnd
}
xxxxxxxxxx
 
fun markdownLink(title: String?, url: String) =
    if (title.isNullOrEmpty()) url else "[$title]($url)"
// plain link
println(markdownLink(title = null, url = "https://kotlinlang.org")) // https://kotlinlang.org
// link with custom title
println(markdownLink(title = "Kotlin Language", url = "https://kotlinlang.org")) // [Kotlin Language](https://kotlinlang.org) 
Open in Playground →
Target: JVMRunning on v.2.1.20

inline fun CharSequence?.isNullOrEmpty(): Boolean(source)

Returns true if this nullable char sequence is either null or empty.

Since Kotlin

1.0

Samples

import java.util.Locale
import kotlin.test.*

fun main() { 
   //sampleStart 
   fun markdownLink(title: String?, url: String) =
    if (title.isNullOrEmpty()) url else "[$title]($url)"

// plain link
println(markdownLink(title = null, url = "https://kotlinlang.org")) // https://kotlinlang.org

// link with custom title
println(markdownLink(title = "Kotlin Language", url = "https://kotlinlang.org")) // [Kotlin Language](https://kotlinlang.org) 
   //sampleEnd
}
xxxxxxxxxx
 
fun markdownLink(title: String?, url: String) =
    if (title.isNullOrEmpty()) url else "[$title]($url)"
// plain link
println(markdownLink(title = null, url = "https://kotlinlang.org")) // https://kotlinlang.org
// link with custom title
println(markdownLink(title = "Kotlin Language", url = "https://kotlinlang.org")) // [Kotlin Language](https://kotlinlang.org) 
Open in Playground →
Target: JVMRunning on v.2.1.20

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