Scala Notes

Maps

Here the example of Map and the immutable map.

import java.net.URL
import java.util.Scanner


val in = new Scanner(
  new URL("https://raw.githubusercontent.com/rdwallis/alice/master/src/main/webapp/WEB-INF/book/10.txt").openStream())
var count = Map[String, Int]()
//var count = scala.collection.mutable.Map[String, Int]()

while (in.hasNext()){
  val word = in.next()
  count.+=(word->(count.getOrElse(word,0)+1))
  //count(word) = count.getOrElse(word,0)+1
}

count("Alice")

Above code segment, mutable Map is commented. This is an exercise I did from the Scala for the Impatient.