Xtykutl

Singleton object LongLines which I created can't be recognized in object with main function (FindingLines). I put their files (LongLines.scala, FindingLines.scala ) in /src/main/scala/com/files/lines directory. Program code should have to find in particular file the lines which length is greater than parameter width.

Codes:

1) LongLines.scala (version from book I learn):

package com.files.lines

import scala.io.Source



object LongLines {



    def processFile(filename: String, width: Int) {

      val source = Source.fromFile(filename)

      for (line <- source.getLines())

      processLine(filename, width, line)

    }



    private def processLine(filename: String,

      width: Int, line: String) {

      if (line.length > width)

      println(filename +": "+ line.trim)

    }

}

2) LongLines.scala (my own version):

package com.files.lines

import scala.io.Source._

import java.nio.files.Paths._



object LongLines {



   def processFile(filePath: String, width:Int): Unit = {

      val path = get(filePath)

      val fileName = path.getFileName.toString

      val lines = fromFile(filePath).getLines().toList

      for (line<-lines) processLines(fileName,line,width)

   }



   private def processLines(fileName: String, line: String, width: Int): Unit = {

      if (line.length() > width) println(s"$fileName: $line");

   } 

}

3) FindingLines.scala (book version I used - only version):

package com.files.lines    



object FindLongLines {



  def main(args: Array[String]) = {

    val width = args(0).toInt

    for (arg <- args.drop(1))

        LongLines.processFile(arg, width)

 } 

}

Error (compiled from linux terminal):

After I compiled program with my version and book version of LongLines.scala (separately, of course):

  scalac FindingLines.scala 

I've got this error:

FindLongLines.scala:15: error: not found: value LongLines

        LongLines.processFile(arg, width)

        ^

one error found

Solution:

1) I removed "package com.file.lines" from both files (FindingLines.scala, LongLines.scala) - that means I need not to remove those files in this package (directory). Those two files could stay in src/main/scala directory.

2) scalac FindingLines.scala LongLines.scala

3) scala FindingLines.scala 45 ~/workspace/Rational/src/Rational.scala