生成随机数组

引用链接 http://blog.youkuaiyun.com/poda_/article/details/49793995

//origionArrayLength 原始数组长度
//randomArrayLength 组成的随机数组长度
public int[] GetRandomSequence(int origionArrayLength, int randomArrayLength)
{
    int[] origionArray = new int[origionArrayLength];
    int[] randomArray = new int[randomArrayLength];

    for(int i = 0; i < origionArrayLength; i++)
    {
        origionArray[i] = i; 
    }

    int LastIndex = origionArrayLength - 1;//原始数组的最后一位下标
    for(int i = 0; i < randomArrayLength; i++)
    {
        //随机一个数，随机一次，区间-1
        int index = Random.Range(0, LastIndex + 1);
        randomArray[i] = origionArray[index];
        //将区间最后一个数赋值到取到数上
        origionArray[index] = origionArray[LastIndex];
        LastIndex--; 
    }
    return randomArray;
}