原生JavaScript对象数组去重，重构为对象{pro1：[hash], pro02: [hash]}

function unique(objArr) {

    var result = {};

    var proObj = objArr[0];
    for(var pro in proObj){
      var hash = []; 
      for(var i = 0; i < objArr.length; i++){
        var obj = objArr[i];
        for(var pros in obj){
          if(pros === pro){
            var val = obj[pros];
            if(!hash[val]){
              var valueObj = {};
              valueObj.lable = val;
              valueObj.value = val;
              hash.push(valueObj);
              hash[val] = true;
            }
          }
        }
      }
      result[pro] = hash;
    }

    return result;
  };