ajax jquery 拼接数组

Question

现有ajax返回json格式为：
{"customerMap":[{"evaluateDate":"2017","grade":"A"},{"evaluateDate":"2017","grade":"A"}]}
想要在jquery中将起转换成以下格式：
[[x轴标题,数值1],[x轴标题,数值2],......]
[[2017,A],[2017,A]]
求大神赐教

Answer 1

 var customerMap=json.customerMap;
var str="[";
for(var i=0;i<customerMap.length;i++)
{
                str+="["+customerMap[i].evaluateDate+","+customerMap[i].grade+'],'
}
str=str.substr(str.length-1);  //去掉最后一个逗号
str+=']';