| object KLSigPipeFun { | |
| def main(args: Array[String]) = { | |
| val lines = scala.io.Source.stdin.getLines() | |
| val lineNumbers = Iterator.from(1) | |
| val numberedLines = lineNumbers.zip(lines) | |
| val okLines = numberedLines takeWhile { _ => !scala.sys.process.stdout.checkError() } | |
| val outLines = okLines map { case (number, line) => println(number + ":" + line) } | |
| println(outLines.length + " lines counted") | |
| } | |
| } |
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A function is a mapping from one set, called a domain, to another set, called the codomain. A function associates every element in the domain with exactly one element in the codomain. In Scala, both domain and codomain are types.
val square : Int => Int = x => x * x