Recent questions tagged scala

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scala - Context bounds shortcut with higher kinded-types

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

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scala - How to use an Akka Streams SourceQueue with PlayFramework

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

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scala - Best way to turn a Lists of Eithers into an Either of Lists?

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

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scala - What is the difference between unapply and unapplySeq?

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

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scala - DataFrame equality in Apache Spark

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

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scala - Using .tupled method when companion object is in class

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scala - What is the best way to define custom methods on a DataFrame?

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scala - SLICK How to define bidirectional one-to-many relationship for use in case class

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

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scala - Joda DateTime Field on Play Framework 2.0's Anorm

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

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scala - Why sbt runs dependency resolution every time after clean?

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

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scala - Recursive set union: how does it work really?

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scala - How to check whether key or value exist in Map?

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

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1 answer 535 views

scala - In Spark, what is the right way to have a static object on all workers?

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

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1 answer 537 views

scala - Confused how to set up a multi-project sbt project

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

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scala - Filter Spark DataFrame by checking if value is in a list, with other criteria

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

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scala - Join two ordinary RDDs with/without Spark SQL

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

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1 answer 881 views

scala - How do you update multiple columns using Slick Lifted Embedding?

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

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1 answer 882 views

scala - How to extract best parameters from a CrossValidatorModel

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

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1 answer 670 views

scala - How to perform one operation on each executor once in spark

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

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1 answer 788 views

scala - Pattern Matching `@` Symbol

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

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1 answer 670 views

scala - How to deploy my spray API into production?

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

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1 answer 583 views

scala - Impredicative types vs. plain old subtyping

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

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1 answer 721 views

scala - How to filter None's out of List[Option]?

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

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1 answer 695 views

scala - Create new column with function in Spark Dataframe

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

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1 answer 651 views

scala - Create Simple Project SBT 0.10.X

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

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1 answer 779 views

scala - Convert List of tuple to map (and deal with duplicate key ?)

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

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1 answer 822 views

scala - Extract column values of Dataframe as List in Apache Spark

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

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1 answer 535 views

scala - What does "coalgebra" mean in the context of programming?

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

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1 answer 818 views

scala - How to get Kafka messages based on timestamp

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

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1 answer 726 views

scala - Have a List in Play framework web service parameters

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

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1 answer 705 views

scala - Turning Map("a" -> 2, "b" -> 1) into seq("a","a","b") using map

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

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1 answer 709 views

scala - toList on Range with suffix notation causes type mismatch

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

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1 answer 895 views

scala - NullPointerException on implicit resolution

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

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1 answer 639 views

scala - Spark Fixed Width File Import Large number of columns causing high Execution time

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

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1 answer 790 views

scala - muliline string split

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

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