Simple command line args parser.

SimpleArgsParser.scala

/*
  {{{
  def main(args : Array[String]) = {
    val aMap = SimpleArgsParser.parse(args)
    ...
  }
  }}}
  Parse command line args and convert to Map
  For example
  "scala hoge.scala -f fuga.txt --help -v"
  Args is Array("-f","fuga.txt","--help","-v").
  And it is converted to Map("f" -> "fuga.txt","help" -> "","v" -> "").

*/
object SimpleArgsParser{

  def parse(args : Array[String]) : Map[String, String] = {
    if(args.length == 0) return Map.empty
    var map = Map[String, String]()

    def toKey( v : String) = {
      if(v.startsWith("--")){
        v.substring(2)
      }else{
        v.substring(1)
      }
    }

    args.sliding(2,1).foreach( l => {
      if(l(0).startsWith("-")){
        val key = toKey(l(0))
        if(l(1).startsWith("-")){
          map +=( key -> "")
        }else{
          map +=(key -> l(1))
        }
      }
    })
    if(args(args.length - 1).startsWith("-")){
      val key = toKey(args(args.length - 1))
      map +=(key -> "")
    }
    map
  }
}