Question

I build my MyObject array with :

    MyObject[] myObject = (from MyObject varObj in MyObjects
                           select varObj).ToArray();

and now, I’d like to extract 3 random MyObject from this array! How can I do it on C#?

Of course, if array lenght is <3 I need to extract all objects!

Answer 1

        MyObject[] myObject = ...;
        int upper = 1;
        if (myObject.Length > 1)
        {
            Random r = new Random();
            upper = Math.Min(3, myObject.Length);
            for (int i = 0; i < upper; i++)
            {
                int randInd = r.Next(i, myObject.Length);
                MyObject temp = myObject[i];
                myObject[i] = myObject[randInd];
                myObject[randInd] = temp;
            }
        }

now take elements of the array from 0 to upper.