change-path-element.scala

if(2 != args.length) {
  System.err.println("Usage: change-path-element in-elem out-elem")
  System.exit(1)
}

val In = args(0)
val Out = args(1)

//println("In  = " + In)
//println("Out = " + Out)

val Path = System.getenv("PATH")
val PathSep = System.getProperty("path.separator")
//println()
//println("PATH = " + Path)

val NewPath = Path.split(PathSep) map { elem =>
  if(elem == In) Out else elem
} mkString PathSep

//println()
print(NewPath)