Methods on Word Count by Scala

WordCount.scala

```
object WordCount { def main(args: Array[String]): Unit = { 
  val arr = Array("hello flink", "hello spark", "hello spark") 
  val arr_total = arr.flatMap(x => x.split(" ")) 
  // val counts = arr_total.map(word => word->1).groupBy(_._2).map(x => x._1 -> x._2.size) 
  val counts = arr_total.groupBy(w => w).mapValues(_.size) println(counts) } }
```

```
  val counts = arr_total.map((_,1)).reduceByKey(_+_).collect()
  counts.foreach(println)
```