How to stop multiples of game objects instantiating when using random.range with an array

Questions & Answers
1

I am new to scripting and I find it very hard to grasp. I have a project for an internship for my game design skills but this also means I have to do some scripting to complete certain tasks. I have the grasp of most things I need but arrays and loops are not my friends. This is my problem. I instantiate six objects randomly from an array of game objects. This works fine but I frequently get the same object instantiated twice or more. I have searched all the questions in unity and Googled all sorts of word combinations but they all seem to involve integers and numbers printed out not actual game objects.I know I have to use a for loop but I’m not sure where to start. This is the section of code I need to add to I know but I’m not quite sure how.

function LeftChoices()
{
	objArray = new GameObject[6];
	
	for (var i : int = 0 ; i < 6 ; i++)
	{
		objArray _= Instantiate(leftObjArray[Random.Range(0,leftObjArray.Length)], posArray *, Quaternion.identity);*_

* }*
}
If someone could give me a hand that would be absolutely awesome. Many thanks in advance.

2

I made an example where a function GetUniqueRandom stores all previous random numbers in a list and returns the new unique number:

var rndsList : List.<int> = new List.<int>();

function GetUniqueRandom(min : int, max : int) : int
{
    var rnd : int; //define an int to store the rnd number
    do //the do-while loop will perform one loop at minimum and further loops if the while-condition is met 
    {
        rnd = Random.Range(min, max); //generate a random
    }while(rndsList.IndexOf(rnd) != -1); //run another loop (generate a new number) if the list already contains this number

    rndsList.Add(rnd); //store the valid number

    return rnd; //return the number
}

Then call the method from LeftChoices

for (var i : int = 0 ; i < 6 ; i++)
{
   objArray _= Instantiate(leftObjArray[GetUniqueRandom(0,leftObjArray.Length)], posArray *, Quaternion.identity);*_

}
I’m not used to UnityScript so there might be a shorter way.