Above, Below, and Beyond Tech Talk

by Rahel Lüthy

April 14, 2011

Scala Gems #2: Getting Functional

As promised, here is the second post in my haphazardly thrown together Scala series. Over the past few days I have read some chapters in Odersky’s Programming in Scala, and most importantly, I have written my first ~100 lines of code (a basic Minesweeper app with a simple Swing UI). It’s been a lot of fun, and I am still very enthusiastic about many new concepts & constructs. When coding, the biggest challenge is to not fall back to imperative Java style, but really use the functional concepts wherever applicable. I am probably still not radical enough, but for the time being, here is my take on revealing non-mined cells:

def reveal = {
  if (revealed == false) {
    revealed = true
    if (adjacentMineCount == 0) {
      adjacentCells.foreach (cell => cell.reveal)

In summary: 1 usage of => (and even a recursion ;-)).