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목록fold (1)

DBILITY

kotlin reduce, fold

empty colletion일때 reduce는 오류가 발생한다. java.lang.UnsupportedOperationException: Empty collection can't be reduced. 가능성이 있을때는 fold를 사용해도 되나?^^ data class Todo(val id: Int, val content: String, val datetime: Long) ... private val initDataList = mutableListOf() /*val maxId = fold(Todo(0, String(), 0L)) { acc, todo -> if (acc.id.compareTo(todo.id) == 1) acc else todo }.id + 1*/ var maxId = 1 if (size>1..
android/kotlin 2024. 3. 11. 10:57
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