Recent questions tagged scala

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scala - Function literal with multiple implicit arguments

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

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scala - How to test a Try[T] with ScalaTest correctly?

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scala - Error initializing SparkContext: A master URL must be set in your configuration

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scala - Using JUnit @Rule with ScalaTest (e.g. TemporaryFolder)

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

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scala - Inconsistent behaviour for xs.sliding(n) if n is less than size?

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

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scala - How to escape column names with hyphen in Spark SQL

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scala - Apache Flink: ProcessWindowFunction KeyBy() multiple values

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

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scala - Spark Shell Add Multiple Drivers/Jars to Classpath using spark-defaults.conf

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

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scala - Unnecessary recompilations by SBT

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

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scala - How to replace empty values in a column of DataFrame?

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

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scala - Using ReduceByKey to group list of values

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

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scala - Why does RDD.foreach fail with "SparkException: This RDD lacks a SparkContext"?

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

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scala - problem with implicit ambiguity between my method and conforms in Predef

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

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scala - How to order execution of tests in sbt?

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

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scala - spark apply function to columns in parallel

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

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scala - How to create a wrapper of List with a specific type

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

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scala - Spark sample is too slow

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

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scala - Type inference with existential type

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

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scala - Spark: broadcasting jackson ObjectMapper

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

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1 answer 783 views

scala - How to eval code that uses InterfaceStability annotation (that fails with "illegal cyclic reference involving class InterfaceStability")?

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

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1 answer 981 views

scala - Call Solr asynchronous from Play Framework

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

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scala - How to create a schema from CSV file and persist/save that schema to a file?

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

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1 answer 1.1k views

scala - Why Apache Spark take function not parallel?

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

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scala - String interpolation, escaping quotation mark

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

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scala - Mockito's mock throw ClassNotFoundException in Spark application

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

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1 answer 939 views

scala - RDD to LabeledPoint conversion

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 broadcast error: exceeds spark.akka.frameSize Consider using broadcast

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

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1 answer 1.3k views

scala - Using Tuples in map, flatmap,... partial functions

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

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1 answer 861 views

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

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

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

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

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scala - Explode multiple columns in Spark SQL table

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

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

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

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scala - Spark decimal type precision loss

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

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

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

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1 answer 952 views

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

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

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