scala - How to access and update a value in a mutable map of map of maps -


i've three-level data structure (indentation , line breaks readability):

scala> import scala.collection.mutable.map import scala.collection.mutable.map  scala> val m = map("normal" -> map("home" -> map("wins" -> 0, "scores" -> 0),                                    "away" -> map("wins" -> 0, "scores" -> 0))) m: scala.collection.mutable.map[java.lang.string,    scala.collection.mutable.map[java.lang.string,    scala.collection.mutable.map[java.lang.string,int]]] =  map((normal,map(away -> map(wins -> 0, scores -> 0),      home -> map(wins -> 0, scores -> 0))))

accessing innermost data (scores) requires lot of typing:

import org.scalatest.{assertions, funsuite}  class mapexamplesso extends funsuite assertions {   test("update values in mutable map of map of maps") {     import scala.collection.mutable.map     // m map accumulator     val m = map("normal" ->                  map("home" -> map("wins" -> 0, "scores" -> 0),                     "away" -> map("wins" -> 0, "scores" -> 0)                   )           )     //     // there less verbose way increment scores ?     //     assert(m("normal").apply("home").apply("scores") === 0)      val s1 = m("normal").apply("home").apply("scores") + 1     m("normal").apply("home").update("scores", s1)      assert(m("normal").apply("home").apply("scores") === 1)      val s2 = m("normal").apply("home").apply("scores") + 2     m("normal").apply("home").update("scores", s2)      assert(m("normal").apply("home").apply("scores") === 3)   } }

is there less verbose way modify value of scores ?

i'm scala newbie, other observations of code above welcome.

you don't have use "apply" "()"

m("normal")("home")("scores") = 1

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