Shuffling array sample for Unity

Shuffle.cs

using UnityEngine;
using System.Collections;

public class Shuffle : MonoBehaviour {
	public int[] blockNums;
	int[] blockIndexArray ;

	// Use this for initialization
	void setupArray(){
		int total = 0 ;
		for ( int i = 0 ; i < blockNums.Length ; i ++ ){
			total += blockNums[i] ;
		}
		blockIndexArray = new int[total];

		int count = 0 ;
		for ( int i = 0 ; i < blockNums.Length ; i ++ ){
			for ( int j = 0 ; j < blockNums[i] ; j ++ ){
				blockIndexArray[count] = i ;
				count ++ ;
			}
		}
	}

	void shuffle()
	{
		for(int i=0;i<blockIndexArray.Length;i++)
		{
			int j = Random.Range(0,blockIndexArray.Length);
			int t = blockIndexArray[i];
			blockIndexArray[i] = blockIndexArray[j];
			blockIndexArray[j] = t;
		}
	}

	void Start () {
		setupArray();
		shuffle();

		for ( int i = 0 ; i < blockIndexArray.Length ; i ++ ){
			Debug.Log( blockIndexArray[i] );
		}
	}
	
	// Update is called once per frame
	void Update () {
	
	}
}