Myujth

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