数组中相同的值相加

    var arr = [1,2,3,1,2,33,11,2,3,1,34,2,11];
    var obj = {};
    var result = [];
    for(var i=0;i<arr.length;i++){
      if (obj[arr[i]]!=undefined) {
          obj[arr[i]]=obj[arr[i]]+arr[i];
      }else{
        obj[arr[i]]=arr[i];
      }

    }

问卷统计里面本单位与其他单位的统计参与人数与比率

for(var i=0;i<arr2.length;i++){
      if (obj2[arr2[i].split('/')[0]]!=undefined) {
          obj2[arr2[i].split('/')[0]]=obj2[arr2[i].split('/')[0]]+parseInt(arr2[i].split('/')[1]);
      }else{
        obj2[arr2[i].split('/')[0]]=parseInt(arr2[i].split('/')[1]);
      }

    }

 若不想相同的值相加，而是把数组去重

var arr = [1,2,3,1,2,33,11,2,3,1,34,2,11];
var obj = {};
var result = [];

for (var i = 0; i < arr.length; i++) {
   obj[arr[i]]=arr[i];
}