Recent questions tagged scala

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

scala - how to filter out a null value from spark dataframe

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1.4k views 1 answer

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

scala - How to set heap size for sbt?

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1.3k views 1 answer

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

scala - How to write unit tests in Spark 2.0+?

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1.1k views 1 answer

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

scala - How to create SBT project with IntelliJ Idea?

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1.2k views 1 answer

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

scala - @karate How to pass parameter to a feature file in gatling simulation class?

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1.5k views 1 answer

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

scala - Apache Spark how to append new column from list/array to Spark dataframe

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1.1k views 1 answer

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

scala - How to get ClassTag form TypeTag, or both at same time?

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1.3k views 1 answer

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

scala - Why doesn't Array's == function return true for Array(1,2) == Array(1,2)?

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1.2k views 1 answer

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

scala - Why can't I return a concrete subtype of A if a generic subtype of A is declared as return parameter?

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1.2k views 1 answer

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

scala - call of distinct and map together throws NPE in spark library

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1.2k views 1 answer

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

scala - How do I make a function involving futures tail recursive?

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1.5k views 1 answer

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

scala - Explanation of fold method of spark RDD

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1.2k views 1 answer

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

scala - How to get path to the uploaded file

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1.1k views 1 answer

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

scala - What are the rules to govern underscore to define anonymous function?

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1.5k views 1 answer

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

scala - Result type of an implicit conversion must be more specific than AnyRef

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2.4k views 1 answer

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

scala - No Json serializer as JsObject found for type play.api.libs.json.JsObject

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1.3k views 1 answer

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

scala - Is there a way to control which implicit conversion will be the default used?

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1.3k views 1 answer

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

scala - What is going wrong with `unionAll` of Spark `DataFrame`?

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1.2k views 1 answer

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

scala - Run custom task automatically before/after standard task

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1.2k views 1 answer

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

scala - How to convert unix timestamp to date in Spark

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1.4k views 1 answer

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

scala - Cartesian product of two lists

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1.7k views 1 answer

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

scala - How to use Column.isin with list?

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1.6k views 1 answer

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

scala - Better way to convert a string field into timestamp in Spark

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1.4k views 1 answer

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

scala - Syntax sugar: _* for treating Seq as method parameters

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1.2k views 1 answer

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

scala - Stackoverflow due to long RDD Lineage

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1.0k views 1 answer

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

scala - java.io.IOException: Could not locate executable nullinwinutils.exe in the Hadoop binaries. spark Eclipse on windows 7

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1.2k views 1 answer

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

scala - how do I get sbt to use a local maven proxy repository (Nexus)?

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1.3k views 1 answer

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

scala - Shuffle a list of integers with Java 8 Streams API

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1.4k views 1 answer

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