JAVA: class TicketBookingSystem { private int ticket = 10;

synchronized public void bookticket(int requested_ticket,String name)
{
    if(requested_ticket > ticket)
    {
        System.out.println("Not enough tickets for "+name);
    }
    else{
        ticket -= requested_ticket;
        System.out.println(requested_ticket+" no of tickets booked for "+name);
    }
}

}

class Customer extends Thread { public String name; public int ticket; public TicketBookingSystem tbs;

public Customer(String name,int t,TicketBookingSystem tb)
{
    ticket = t;
    tbs = tb;
    this.name = name;
}

public void run()
{
    tbs.bookticket(ticket,name);
}

}

public class aadith { public static void main(String args[]) { TicketBookingSystem tbs = new TicketBookingSystem();

    Customer c1 = new Customer("pradeep",5,tbs);
    Customer c2 = new Customer("karthik",5,tbs);
    Customer c3 = new Customer("rajesh",5,tbs);

    c1.start();
    c2.start();
    c3.start();
}

} class commonsum { private int sum = 0;

public void addtosum(int value)
{
    sum += value;
}

public int getsum()
{
    return sum;
}

}

class Calculator extends Thread { private commonsum csum; private int lower = 0; private int upper = 0;

public Calculator(int lower,int upper,commonsum c)
{
    csum = c;
    this.lower = lower;
    this.upper = upper;
}


public void run()
{
    int sum = 0;

    for(int num=lower;num<upper;num++)
    {
        int count = 0;

        for(int i=1;i<=num;i++)
        {
            if(num%i == 0)
            {
                count++;
            }
        }
        if(count == 2)
        {
            sum+=num;
        }
    }

    System.out.println("Sum between "+lower+" to "+upper+"is: "+sum);

    csum.addtosum(sum);

}

}

public class aadith1 { public static void main(String args[]) { commonsum csum = new commonsum();

    Calculator c1 = new Calculator(0,250,csum);
    Calculator c2 = new Calculator(250,500,csum);
    Calculator c3 = new Calculator(500,750,csum);
    Calculator c4 = new Calculator(750,1000,csum);

    c1.start();
    c2.start();
    c3.start();
    c4.start();

     try {
        c1.join(); // Wait until the thread finishes
        c2.join();
        c3.join();
        c4.join();

        System.out.println("Total sum is: "+csum.getsum());
    } catch (InterruptedException e) {
        e.printStackTrace();
    }
}

} Scala : import scala.io.StdIn

object sample {

def add2(x:Int):Int = {
    x+2
}

def mymapfn(arr:Array[Int],fn:(Int)=>Int):Array[Int] = {

    var newarr = new Array[Int](arr.length)

    for(i<-0 to arr.length-1)
    {
        newarr(i) = fn(arr(i))
    }

    newarr

}

def main(args:Array[String])
{
    println("Enter the length of the array: ")

    var length = StdIn.readInt()

    var arr: Array[Int] = new Array[Int](length)

    println("Enter the elements of the array:")

    for(i<-0 to length-1)
    {
        var value = StdIn.readInt()
        arr(i) = value
    }

    println("The entered array is:")

    for(i<-0 to arr.length-1)
    {
        print(arr(i)+" ")
    }
    println()

    var array = mymapfn(arr,add2)

    println("The mapped array is: ")

    for(i<-0 to array.length-1)
    {
        print(array(i)+" ")
    }
    println()

}

}

Implementation of map function