一维数组变二维数组

if (datas) {
  /**********************基础信息开始******************************/
  if(self.showtype() =='chart') {
  var len = datas.length;
  var n=2;
  var lineNum =len%2 ===0?len/2:Math.floor((len/2)+1);
  var res = [];
  for(var i=0; i<lineNum;i++){
    var temp =datas.slice(i*n,i*n+n);
    res.push({trlist:{tr1:temp[0],tr2:temp[1]}});
  }
  self.detaillist(res);
[{…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}]
变为
[{…}, {…}, {…}, {…}, {…}, {…}]
0: {trlist: {…}}
1: {trlist: {…}
}2: {trlist: {…}}
3: {trlist: {…}}
4: {trlist: {…}}
5: {trlist: {…}}形式