//笛卡兒積組合
function descartes(list)
{
  //parent上一級索引;count指針計數(shù)
  var point = {};
  var result = [];
  var pIndex = null;
  var tempCount = 0;
  var temp  = [];
  //根據(jù)參數(shù)列生成指針對象
  for(var index in list)
  {
    if(typeof list[index] == 'object')
    {
      point[index] = {'parent':pIndex,'count':0}
      pIndex = index;
    }
  }
  //單維度數(shù)據(jù)結構直接返回
  if(pIndex == null)
  {
    return list;
  }
  //動態(tài)生成笛卡爾積
  while(true)
  {
    for(var index in list)
    {
      tempCount = point[index]['count'];
      temp.push(list[index][tempCount]);
    }
    //壓入結果數(shù)組
    result.push(temp);
    temp = [];
    //檢查指針最大值問題
    while(true)
    {
      if(point[index]['count']+1 >= list[index].length)
      {
        point[index]['count'] = 0;
        pIndex = point[index]['parent'];
        if(pIndex == null)
        {
          return result;
        }
        //賦值parent進行再次檢查
        index = pIndex;
      }
      else
      {
        point[index]['count']++;
        break;
      }
    }
  }
}