What is the difference between build.sbt and build.scala?

Question

Explain the main difference between List and Stream in Scala Collection API? How do we prove that difference? When do we choose Stream?

Answer 1

First understand this example -

build.sbt:

name := "hello"

version := "1.0"

Above is a shorthand notation roughly equivalent to this project/Build.scala:

import sbt._
import Keys._

object Build extends Build {
  lazy val root = Project(id = "root", base = file(".")).settings(
    name := "hello",
    version := "1.0"      
  )
}

Now I thinks it makes clear that when .sbt's are being compiled, they are before that sort of merged with the .scala files inside project directory.

Credit: http://stackoverflow.com/questions/18000103/what-is-the-difference-between-build-sbt-and-build-scala