数组查重的方法

public function CheckRepeatClass():String
{
    var repeatClass:String = "";
    var strClass:String = "";
            
    if (m_aryData && m_aryData.length > 0)
    {
        for (var i:int = 0; i < m_aryData.length; i++)
        {
            if (strClass.indexOf(m_aryData[i].classification) > -1)
            {
                repeatClass += ";“" + m_aryData[i].classification + "”";
            }
            else
            {
                if (0 == i)
                {
                    strClass += m_aryData[i].classification;
                }
                else
                {
                    strClass += ";" + m_aryData[i].classification;
                }
            }
        }
                
        if ("" != repeatClass)
        {
            repeatClass = repeatClass.substring(1);
        }
    }
            
    return repeatClass;
}