Is it good practice to make case classes sealed?
来源： https://stackoverflow.com/questions/31128383/is-it-good-practice-to-make-case-classes-sealed
scala
Scala RDD matching with similar wording
来源： https://stackoverflow.com/questions/64242039/scala-rdd-matching-with-similar-wording
Scala RDD matching with similar wording
来源： https://stackoverflow.com/questions/64242039/scala-rdd-matching-with-similar-wording
Scala RDD matching with similar wording
来源： https://stackoverflow.com/questions/64242039/scala-rdd-matching-with-similar-wording
Scala RDD matching with similar wording
来源： https://stackoverflow.com/questions/64242039/scala-rdd-matching-with-similar-wording
Apache Flink output to csv file for each GroupedDataSet
来源： https://stackoverflow.com/questions/64527882/apache-flink-output-to-csv-file-for-each-groupeddataset
Scala Future
Future scala.concurrent.Future 异步执行代码块 import java.time._ import scala.concurrent._ import ExecutionContext.Implicits.global // 全局线程池 Future { Thread.sleep(10000) println(s"This is the future at ${LocalTime.now}") } println(s"This is the present at ${LocalTime.now}") 监听结果（阻塞） import scala.concurrent.duration._ val f = Future { Thread.sleep(10000); 42 } val result = Await.result(f, 10.seconds) //阻塞10s val f = Future { ... } Await.ready(f, 10.seconds) val Some(t): Option[Try[T]] = f.value t match { case Success(v) => println(s"The answer is $v") case Failure(ex) => println(ex.getMessage) } ready
Convert row values into columns with its value from another column in spark scala [duplicate]
来源： https://stackoverflow.com/questions/50348236/convert-row-values-into-columns-with-its-value-from-another-column-in-spark-scal
spark convert dataframe to dataset using case class with option fields
来源： https://stackoverflow.com/questions/55114210/spark-convert-dataframe-to-dataset-using-case-class-with-option-fields
spark convert dataframe to dataset using case class with option fields
来源： https://stackoverflow.com/questions/55114210/spark-convert-dataframe-to-dataset-using-case-class-with-option-fields