Recent questions tagged scala

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

scala - Joining two DataFrames in Spark SQL and selecting columns of only one

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802 views 1 answer

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

scala - SBT including the version number in a program

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727 views 1 answer

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

scala - Why Future.sequence executes my futures in parallel rather than in series?

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836 views 1 answer

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

scala - Unable to use for comprehension to map over List within Future

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777 views 1 answer

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

scala - Noise free JSON format for sealed traits with Play 2.2 library

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749 views 1 answer

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

scala - Checking if values in List is part of String

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719 views 1 answer

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

scala - How does this recursive List flattening work?

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661 views 1 answer

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

scala - Context bounds shortcut with higher kinded-types

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739 views 1 answer

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

scala - How to use an Akka Streams SourceQueue with PlayFramework

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782 views 1 answer

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

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

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756 views 1 answer

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

scala - What is the difference between unapply and unapplySeq?

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625 views 1 answer

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

scala - DataFrame equality in Apache Spark

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759 views 1 answer

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

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

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730 views 1 answer

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

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

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685 views 1 answer

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

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

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686 views 1 answer

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

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

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675 views 1 answer

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

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

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682 views 1 answer

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

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

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724 views 1 answer

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

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

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752 views 1 answer

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

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

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551 views 1 answer

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

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

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553 views 1 answer

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

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

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839 views 1 answer

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

scala - Join two ordinary RDDs with/without Spark SQL

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711 views 1 answer

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

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

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897 views 1 answer

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

scala - How to extract best parameters from a CrossValidatorModel

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896 views 1 answer

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

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

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686 views 1 answer

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

scala - Pattern Matching `@` Symbol

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799 views 1 answer

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

scala - How to deploy my spray API into production?

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689 views 1 answer

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