Question

How to add tuple to the start of a list of tuples in Scala

Answer 1

object O {
    def main(args: Array[String]): Unit = {
        var lsttpl = List((4, 6), (8, 1), (9, 2))

        println(lsttpl)
        
        lsttpl = (5, 3) :: lsttpl
        
        println(lsttpl)
        
        for (pair <- lsttpl) {
            println("Left = " + pair._1 + " Right = " + pair._2)
        }       
    }
}




/*
run:

List((4,6), (8,1), (9,2))
List((5,3), (4,6), (8,1), (9,2))
Left = 5 Right = 3
Left = 4 Right = 6
Left = 8 Right = 1
Left = 9 Right = 2

*/

 

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