Tuple,Array,Map,文件操作

 1 package com.dtgroup.study
 2 import scala.io.Source
 3 
 4 object TupleArrayMapFile {
 5   def main(arg: Array[String]): Unit = {
 6     // Tuple
 7     var tuple = (1, "hadoop", "spark")
 8     println(tuple._1)
 9     println(tuple._2)
10     println(tuple._3)
11 
12     // Array
13     var items = Array(1, 2, 3)
14     for (i <- 0 until items.length) println(items(i))
15 
16     for (item <- items) println(item)
17 
18     // Map
19     var maps = Map("spark" -> 5, "hadoop" -> 8)
20     println(maps("spark"))
21     println(maps("hadoop"))
22 
23     for ((k, v) <- maps) println("k:" + k + ",v:" + v)
24     for ((k, _) <- maps) println("k:" + k)
25 
26     // file operator
27     var file = Source.fromFile("d:\\spark.txt")
28     for (line <- file.getLines()) println(line)
29   }
30 }