scala>?val?a =?List("hadoop hive spark flink flume",?"kudu hbase sqoop storm")
a:?List[String]?=?List...(hadoop hive spark flink flume,?kudu hbase sqoop storm)
// 使用map将文本行转换为单词数组
scala>?a.map(x=>x.split(..." "))
res5:?List[Array[String]]?=?List(Array(hadoop,?hive,?spark,?flink,?flume),?Array(kudu,?hbase,?sqoop...,?kudu,?hbase,?sqoop,?storm)
使用flatMap简化操作
参考代码
scala>??val?a =?List("hadoop hive spark flink flume",...?"kudu hbase sqoop storm")
a:?List[String]?=?List(hadoop hive spark flink flume,?kudu hbase sqoop storm