Scala foreach & for 使用

foreache: Scala> Array(“hbase”,”hive”,”spark”,”hadoop “).foreach((a:String) => println(a)) 省略参数的类型声明，Scala是能够进行类型推断的. Scala> Array(“hbase”,”hive”,”spark”,”hadoop “).foreach(a => print(a + ’ ‘)) 省略了参数:

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