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Update Spark_Transformation和Action算子.md

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heibaiying
2019-06-04 14:41:44 +08:00
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notes/Spark_Transformation和Action算子.md
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@@ -73,7 +73,7 @@ sc.parallelize(list).filter(_ >= 10).foreach(println)
### 1.3 flatMap ### 1.3 flatMap
`flatMap(func)`与`map`类似，但每一个输入的 item 会被映射成 0 个或多个输出的 items（ *func* 返回类型需要为`Seq`类型）。 `flatMap(func)`与`map`类似，但每一个输入的item会被映射成 0 个或多个输出的items（ *func* 返回类型需要为`Seq`）。
```scala ```scala
val list = List(List(1, 2), List(3), List(), List(4, 5)) val list = List(List(1, 2), List(3), List(), List(4, 5))