Scala coding styles and conventions?

Question

I think Scala goes too far from simplicity, like its syntax. For example Martin Odersky wrote the method in his book :

def calculate(s: String): Int =
  if (         


        

Answer 1

Here is a link to the Scala Style Guide.

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The Curly Braces section says:

Curly-Braces:

Curly-braces should be omitted in cases where the control structure represents a pure- functional operation and all branches of the control structure (relevant to if/else) are single-line expressions. Remember the following guidelines:

• if - Omit braces if you have an else clause. Otherwise, surround the contents with curly braces even if the contents are only a single line.

• while - Never omit braces (while cannot be used in a pure-functional manner).

• for - Omit braces if you have a yield clause. Otherwise, surround the contents with curly-braces, even if the contents are only a single line.

• case - Omit braces if the case expression ts on a single line. Otherwise, use curly braces for clarity (even though they are not required by the parser).

  val news = if (foo)
    goodNews()
  else
    badNews()
  
  if (foo) {
    println("foo was true")
  }
  
  news match {
    case "good" => println("Good news!")
    case "bad" => println("Bad news!")
  }
  

I wish people followed this style guide :(

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Please note that I don't agree with "Omit braces if if has an else clause" part. I'd much prefer to see the code like this:

def calculate(s: String): Int = {
  if (cache.contains(s)) {
    cache(s)
  } else {
    val acc = new ChecksumAccumulator
    for (c <- s) {
      acc.add(c.toByte)
    }
    val cs = acc.checksum()
    cache += (s -> cs)
    cs
  }
}