Hi everyone , I have encountered some problems when using spark, I have encountered a type of WrappedArray(), I don't know how to iterate over this type, or how to convert this type to a List or an Array?
Also, after I convert the dataframe type data into JavaRDD, the data type is JavaRDD[Row]. I don't know how to traverse this JavaRDD type. I use foreach(x=>println(x)) for output, but throw exception:<console>:30: error: missing parameter type If anyone knows how to solve this, I am really grateful. After all, these problems have bothered me for the whole two days. Warm regards, Sanders Wang