Recent questions tagged scala

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

scala - Creating a method which returns one or two parameters generically

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865 views 1 answer

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

scala - Why do I get conflicting cross-version in sbt on one environment but not another?

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1.3k views 1 answer

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

scala - Explode multiple columns in Spark SQL table

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1.3k views 1 answer

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

scala - How to stop gracefully the actor system for an akka-http server that must be deployed.

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1.0k views 1 answer

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

scala - Spark decimal type precision loss

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1.4k views 1 answer

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

scala - Creating/accessing dataframe inside the transformation of another dataframe

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893 views 1 answer

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

scala - How to apply a function to a column of a Spark DataFrame?

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958 views 1 answer

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

scala - UNRESOLVED DEPENDENCIES installing Deadbolt on Play Framework 2.2.1

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852 views 1 answer

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

scala - Test if implicit conversion is available

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1.0k views 1 answer

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

scala - How to convert keys in a Map to lower case?

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1.3k views 1 answer

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

scala - How to pattern-match against every numeric class in one case?

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1.1k views 1 answer

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

scala - joda DateTime format cause null pointer error in spark RDD functions

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995 views 1 answer

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

scala sbt assembly "no main manifest attribute"

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1.2k views 1 answer

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

scala - Is there a way to test at compile-time that a constant is a compile-time constant?

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1.2k views 1 answer

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

scala - strange error message: bad symbolic reference. A signature in package.class refers to term apache in package org which is not available

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1.1k views 1 answer

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

scala - Handling Doubles in ScalaTest

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1.1k views 1 answer

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

scala - why doesn't null.asInstanceOf[Int] throw a NullPointerException?

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966 views 1 answer

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

scala - Why wrapping a generic method call with Option defers ClassCastException?

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1.1k views 1 answer

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

scala - Play 2 - Set header on all responses?

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1.0k views 1 answer

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

scala - NLineInputFormat not working in Spark

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886 views 1 answer

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

scala - How does spray.routing.HttpService dispatch requests?

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900 views 1 answer

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

scala - Coalesce duplicate columns in spark dataframe

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1.4k views 1 answer

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

scala - How to model an entity with many children in Sorm?

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869 views 1 answer

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

scala - How to read a file from HDFS in map() quickly with Spark

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900 views 1 answer

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

scala - Coalesce duplicate columns in spark dataframe

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1.1k views 1 answer

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

scala - How do you stop building an Option[Collection] upon reaching the first None?

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1.1k views 1 answer

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

scala - Spark Dataset : Example : Unable to generate an encoder issue

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927 views 1 answer

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

scala - Some questions about difference between call-by-name and 0-arity functions

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929 views 1 answer

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