Scala IO reads by lexical units and numbers

import scala.io.Source

//  The so-called lexical units refer to strings separated by specific symbols ,
//  If the data in the data source file is a number in string form ,
//  We can easily get these data directly from the file 
object D03_ Read by lexical units and numbers  {
    

  def main(args: Array[String]): Unit = {
    
    val source = Source.fromFile("./data/3.txt")
    val str = source.mkString
    //  Cut according to blank characters 
    /** * \s For white space characters , That is, the space 、\t、\n、\r etc.  * +： Quantifier , That is, the previous content appears at least once  */
    val strArr: Array[String] = str.split("\\s+")
    //  Convert a string array to int An array of types 
    val intArr: Array[Int] = strArr.map(_.toInt)

    for (num <- intArr) print((num + 1) + " ")

    source.close()
  }

}

3.txt Content

10 2 5
11 2
5 3 9 7

3.txt Location