object StringSplitterProgram {
/**
* Splits a multi-line string into a list of individual lines.
* Automatically handles cross-platform line endings (Unix LF and Windows CRLF)
* and strips trailing newline characters.
*
* @param str The input multi-line string to be split.
* @return A List[String] containing each individual line.
*/
def splitByNewline(str: String): List[String] = {
// Guard clause to handle null or empty inputs safely
if (str == null || str.isEmpty) {
List.empty
} else {
// linesIterator returns an Iterator[String] which is memory-efficient
// and natively handles both \n and \r\n endings without leaving trailing carriage returns.
str.linesIterator.toList
}
}
def main(args: Array[String]): Unit = {
// Sample text containing mixed line endings (Unix LF, Windows CRLF, and an empty line)
val multilineText = "Hello world!\nThis is line two.\r\n\nFinal line here."
// Call the splitting function
val resultLines = splitByNewline(multilineText)
// Print out the parsed lines with their indices
resultLines.zipWithIndex.foreach { case (line, index) =>
println(s"Line ${index + 1}: '$line'")
}
}
}
/*
run:
Line 1: 'Hello world!'
Line 2: 'This is line two.'
Line 3: ''
Line 4: 'Final line here.'
*/
