Recent questions tagged scala

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scala - Inheriting a trait twice

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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scala - How to convert X => Option[R] to PartialFunction[X,R]

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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scala - Match "fallthrough": executing same piece of code for more than one case?

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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scala - Play2 Framework proxy streaming content to client keeps connection open after streaming is done

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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scala - Spark: sc.WholeTextFiles takes a long time to execute

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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scala - Testing a Play2 application with SecureSocial using dependency injection

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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scala - Why makes calling error or done in a BodyParser's Iteratee the request hang in Play Framework 2.0?

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 703 views

scala - Why method defined like "cons[B >: A](v: B)" accepts argument of type which is not supertype of A?

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 723 views

scala - How to do custom operations on GroupedData in Spark?

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 1.4k views

scala - Spark dataframe checkpoint cleanup

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 956 views

scala - How to read and write multiple tables in parallel in Spark?

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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scala - Iterate Over a tuple

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 960 views

scala - merge multiple small files in to few larger files in Spark

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 846 views

scala - Macro to access source code text at runtime

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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scala - Is there any difference between flatten and flatMap(identity)?

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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scala - Dropping empty DataFrame partitions in Apache Spark

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 662 views

scala - Continuations and for comprehensions -- what's the incompatibility?

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 960 views

scala - Shapeless: generic lens parameterized by case class or field

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 760 views

scala - Is there an Iteratee-like concept which pulls data from multiple sources?

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 885 views

scala - How to generate type hierarchy diagrams with Scaladoc?

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 982 views

scala - How to set heap size in play/activator?

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 746 views

scala - Spark 1.6: java.lang.IllegalArgumentException: spark.sql.execution.id is already set

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 807 views

scala - Find all implicits

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 989 views

scala - IntelliJ IDEA: Cannot import SBT project

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 1.0k views

scala - sbt fails with java.lang.NoClassDefFoundError: sbt/ConsoleOut$

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 922 views

scala - How can I fix the missing implicit value for parameter ta: TildeArrow in a test spec

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 1.2k views

scala - Spark : Read file only if the path exists

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 1.3k views

scala - error: expected class or object definition

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 1.1k views

scala - How does | (pipe) in pattern matching work?

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 833 views

scala - load a local file to spark using sc.textFile()

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 1.1k views

scala - How to pass a list of paths to spark.read.load?

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 890 views

scala - launching a spark program using oozie workflow

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 955 views

scala - Akka HTTP 2.0 to use SSL (HTTPS)

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 693 views

scala - How to create a graph from Array[(Any, Any)] using Graph.fromEdgeTuples

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 742 views

scala - Can we able to use mulitple sparksessions to access two different Hive servers

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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