Clojure's 'let' equivalent in Scala

Question

Often I face following situation: suppose I have these three functions

def firstFn: Int = ...
def secondFn(b: Int): Long = ...
def thirdFn(x: Int, y: Long, z:         


        

Answer 1

Stick with the original form:

def calculate(a: Long) = {
  val first = firstFn
  val second = secondFn(first)

  thirdFn(first, second, second + a)
}

It's concise and clear, even to Java developers. It's roughly equivalent to let, just without limiting the scope of the names.