计算代码行数的程序

LineCounter.scala

object LineCounter {
    def main(args : Array[String]) = {
        val code_exts = Set("cc", "java", "cpp", "c", "py", "cxx", "hs", "scala", "scl")
        def walk(f: java.io.File): Int = {
            val list = f.listFiles()
            var tot = 0
            list foreach { (x) =>
                    if(x.getName contains "模版"){}
                    else if(x.isFile()) {
                        val ext = x.getName lastIndexOf('.') match {
                                case -1 => ""
                                case pos:Int => x.getName.substring(pos + 1).toLowerCase.toString
                        }
                        if(code_exts.contains(ext)) {
                            println(x getName)
                            tot += scala.io.Source.fromFile(x, "latin1").getLines.size
                        }
                    }
                    else tot += walk(x)
            }
            tot
        }
        println("Total Line : " + walk(new java.io.File(".")))
    }
}