Help with sorting values from a class

Question

Well, i need to do show some labels with bot's points in javascript, so I have a class Bot.

 #pragma strict
 
 class Bot extends MonoBehaviour
 {
     var name = "";
     var animal = "";
     var pointsScene1 : float = 0;
     var pointsScene2 : float = 0;
     var pointsScene3 : float = 0;
     var totalPoints : float = 0;
     
     function get Name() : String { return name; }
     function set Name(value : String) { name = value; }
     
     function get Animal() : String { return animal; }
     function set Animal(value : String) { animal = value; }
     
     function get PointsScene1() : float { return pointsScene1; }
     function set PointsScene1(value : float) { pointsScene1 = value; }
     
     function get PointsScene2() : float { return pointsScene2; }
     function set PointsScene2(value : float) { pointsScene2 = value; }
     
     function get PointsScene3() : float { return pointsScene3; }
     function set PointsScene3(value : float) { pointsScene3 = value; }
     
     function get TotalPoints() : float { return totalPoints; }
     function set TotalPoints(value : float) { totalPoints = value; }
 }

This class is populate with random values, until here is all perfect. But i need to "sort" this class to find out the the best bot with "TotalPoints" and complete the labels!

I assign they in Inspector using

 var arr : Bot[];

Any ideas how can i do this?

I tryed something like this to find out

 function Top8(arrTmp : Bot[]) {
     var max = arrTmp[0].TotalPoints;
     for (i = 1; i < arrTmp.Length; i++) {
        if (arrTmp[i].TotalPoints > max) {
          max = arrTmp[i].TotalPoints;
        }
     }
     return max;
 }

I called this function using

 Top8(arr);

And I got the highest value TotalPoints, but I need to check from what bot is, and show it in GUI.Label to do a top 8 including 7 bots and player's points

Im accepting any sugestions!

Answer 1

Best Answer

Answer by Eric5h5 · Apr 17, 2013 at 04:52 AM

Make a function to compare the totalPoints values, either inline:

 var botsArray : Bot[];
 
 function Start () {
     System.Array.Sort (botsArray, function(a : Bot, b : Bot) a.totalPoints.CompareTo(b.totalPoints));
 }

Or as a separate function:

 var botsArray : Bot[];
 
 function Start () {
     System.Array.Sort (botsArray, CompareTotalPoints);
 }
 
 function CompareTotalPoints (a : Bot, b : Bot) : int {
     return a.totalPoints.CompareTo(b.totalPoints);
 }

Some observations: does Bot extend MonoBehaviour for a reason? You have the variables in the Bot class as public, so the getters/setters (which aren't doing anything) seem redundant.

0 Show 1 · Share

Rockgol · Apr 17, 2013 at 05:21 PM 0

Share

Thanks Eric5h5, this compate function worked!

My Bot class extends MonoBehavior because I need to assign the bot array in inspector, without this extend I cant do this.

Answer 2

Answer by The-IT664 · Apr 17, 2013 at 04:27 AM

I would suggest you take a look at a simple sorting algorithm like bubble sort (http://en.wikipedia.org/wiki/Bubble_sort). It's easy to understand and implement, and although it is quite inefficient as sorting algorithms go (n^2), your set is so small it won't make a meaningful difference.

Also, just a suggestion on your current implementation. Instead of storing the max TotalPoints, store and return the Bot instance itself and call Bot.TotalPoints to get the max value.

Edit: While you're at it, I highly recommend spending a bit of time learning about different sorting algorithms. They are vital in many different aspects of programming.

-1 Show 1 · Share

Eric5h5 · Apr 17, 2013 at 04:52 AM 0

Share

There's usually no real reason to make your own sorting algorithm when .NET/Mono has sorting built in.

Help with sorting values from a class

2 Replies

Your answer

Update about the future of Unity Answers

Follow this Question

Related Questions