Question

How to print a list of nested lists in Scala

Answer 1

object MyClass {
    def main(args: Array[String]): Unit = {
       val lst: List[List[Int]] =
            List(
                List(1, 2, 3),
                List(4, 5, 6),
                List(7, 8, 9)
            )
           
        println(lst);
          
        println();
        
        println(lst(0)(0));
        println(lst(0)(1));
        println(lst(1)(1));
        
        println();
           
        for(element<-lst) { 
            println(element);
        } 
          
        println();
          
        lst.map(_.mkString(" ")).foreach(println);
         
        println();
         
        lst.flatten.foreach(print);
         
        println(); println();
         
        lst.foreach(_.foreach(println(_)))
    }
}
   
   
   
   
/*
run:
   
List(List(1, 2, 3), List(4, 5, 6), List(7, 8, 9))

1
2
5

List(1, 2, 3)
List(4, 5, 6)
List(7, 8, 9)

1 2 3
4 5 6
7 8 9

123456789

1
2
3
4
5
6
7
8
9

*/

 

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