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- `+`
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- `>`
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- ...
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- 类型安全
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## 使用心得
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- 能配置化的东西配置化 (pureconfig)
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- [sbt](https://www.scala-sbt.org/1.x/docs/)
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- [SparkSQLExample](https://github.com/apache/spark/blob/master/examples/src/main/scala/org/apache/spark/examples/sql/SparkSQLExample.scala)
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- [A Tale of Three Apache Spark APIs: RDDs vs DataFrames and Datasets](https://databricks.com/blog/2016/07/14/a-tale-of-three-apache-spark-apis-rdds-dataframes-and-datasets.html)
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- [Spark Datasets are not as type-safe as you think](https://medium.com/@pahomov.egor/spark-datasets-are-not-as-type-safe-as-you-think-56a8a9ea0fc) |
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