Recent questions tagged scala

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scala - Create new Dataframe with empty/null field values

I am creating a new Dataframe from an existing dataframe, but need to add new column ("field1" in below code) ... "com.databricks.spark.csv"); See Question&Answers more detail:os...

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

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scala - What is *so* wrong with case class inheritance?

While looking for something else, quite out of mere coincidence I stumbled upon few comments about how diabolical ... case class inheritance ? See Question&Answers more detail:os...

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

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788 views

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scala - Difference between fold and foldLeft or foldRight?

NOTE: I am on Scala 2.8-can that be a problem? Why can't I use the fold function the same way as foldLeft or ... ] foo.fold(0)(_ + _) ^ See Question&Answers more detail:os...

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

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724 views

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scala - Akka-Http client shuts down connection pool while request is in flight

I'm seeing intermittent issues in a test pipeline. Occasionally the akka-http client we use will close the ... around longer than necessary - especially for prod configuration....

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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