Guard Clauses

Return early when input is too small to use.

GuardClauses.kt

fun displayName(name: String): String {
    if (name.isBlank()) {
        return "missing"
    }
    if (name.length < 3) {
        return "short:$name"
    }
    return "name:$name"
}

fun main() {
    val name = 
    val label = displayName(name)

    println("name=${name.ifBlank { "blank" }}")
    println("label=$label")
}

fun displayName(name: String): String {
    if (name.isBlank()) {
        return "missing"
    }
    if (name.length < 3) {
        return "short:$name"
    }
    return "name:$name"
}

fun main() {
    val name = 
    val label = displayName(name)

    println("name=${name.ifBlank { "blank" }}")
    println("label=$label")
}

fun displayName(name: String): String {
    if (name.isBlank()) {
        return "missing"
    }
    if (name.length < 3) {
        return "short:$name"
    }
    return "name:$name"
}

fun main() {
    val name = 
    val label = displayName(name)

    println("name=${name.ifBlank { "blank" }}")
    println("label=$label")
}

guard-clause A guard clause handles an invalid or special case before the main work.