Recent questions tagged scala

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

scala - Joining Spark dataframes on the key

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714 views 1 answer

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

scala - Derive multiple columns from a single column in a Spark DataFrame

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588 views 1 answer

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

scala - private[this] vs private

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525 views 1 answer

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

scala - I want to get the type of a variable at runtime

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506 views 1 answer

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

scala - Reduce, fold or scan (Left/Right)?

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666 views 1 answer

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

scala - Spark Dataframe :How to add a index Column : Aka Distributed Data Index

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1.2k views 1 answer

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

scala - Encode an ADT / sealed trait hierarchy into Spark DataSet column

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905 views 1 answer

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

scala - Why is it possible to declare variable with same name in the REPL?

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521 views 1 answer

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

scala - Operate on neighbor elements in RDD in Spark

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582 views 1 answer

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

scala - Why does partition parameter of SparkContext.textFile not take effect?

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699 views 1 answer

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

scala - Spark: Transpose DataFrame Without Aggregating

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654 views 1 answer

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

scala - How to process multi line input records in Spark

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741 views 1 answer

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

scala - Replace null values in Spark DataFrame

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844 views 1 answer

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

scala - Apache Spark, add an "CASE WHEN ... ELSE ..." calculated column to an existing DataFrame

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707 views 1 answer

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

scala - No configuration setting found for key 'akka.version'

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614 views 1 answer

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

scala - Forward References - why does this code compile?

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615 views 1 answer

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

scala - Java 8 Stream, getting head and tail

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567 views 1 answer

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

scala - Left Anti join in Spark?

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582 views 1 answer

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

scala - Accessing the underlying ActorRef of an akka stream Source created by Source.actorRef

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694 views 1 answer

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

scala - Explicit self-references with no type / difference with ''this''

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578 views 1 answer

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

scala - What is the difference between `##` and `hashCode`?

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532 views 1 answer

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

scala - Escape a dollar sign in string interpolation

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1.1k views 1 answer

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

scala string.split does not work

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687 views 1 answer

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

scala - Spark UDF with varargs

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676 views 1 answer

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

scala - Apache Spark: Get number of records per partition

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679 views 1 answer

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

scala - Why is the Aux technique required for type-level computations?

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434 views 1 answer

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

scala - Doing something before or after all Scalatest tests

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637 views 1 answer

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

scala - How to apply a function to a tuple?

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611 views 1 answer

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