banbara https://blog.hatena.ne.jp/banbara/ BANBARA STUDIO https://banbara-studio.hatenablog.com/ Kotlin 空白チェックを行う場合、if elseでもいいが、ifEmptyやifBlankでも便利にできる。 if elseの場合 val result = if (dummyText.isEmpty()) "hello" else "" println(result) // hello ifEmpty だとスッキリする val result = dummyText.ifEmpty { "hello" } println(result) // hello ifBlank はnullも扱える val result: String? = dummyText?.ifBlank { "hello" } ?: "… 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Fbanbara-studio.hatenablog.com%2Fentry%2F2020%2F07%2F03%2F110447" title="KotlinのifEmptyとifBrank - BANBARA STUDIO" class="embed-card embed-blogcard" scrolling="no" frameborder="0" style="display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;"></iframe> Hatena Blog https://hatena.blog 2020-07-03 11:04:47 rich https://banbara-studio.hatenablog.com/entry/2020/07/03/110447 1.0 100%