I have a JSON object which contains information of employees ,more than one element of may have same employee_id. I need to clean this JSON list solely on the basis of unique employee_id
$scope.employeeRewardData = [
{
"cin_number": 0,
"function_id": 3118,
"grade_id": 163,
"role_id": 15858,
"location_id": 151,
"employee_designation": "NA",
"bu_id": 90,
"gen_id": "GPR01",
"reward_id": 0,
"employee_id": 644,
"reward_category_id": 2,
"sepserial_no": 0,
"sepemployee_id": 0,
"fname": "Smiles",
"emp_type": 381,
"status": "Active",
"location_name": "Corporate",
"level_id": 207,
"lname": "Administrator",
"reward_cust_id": 0,
"reward_to_userid": 644,
"corresponding_status_id": 0,
"company_id": 7,
"reward_by_userid": 644
},
{
"cin_number": 0,
"function_id": 3118,
"grade_id": 163,
"role_id": 15858,
"location_id": 151,
"employee_designation": "NA",
"bu_id": 90,
"gen_id": "GPR01",
"reward_id": 0,
"employee_id": 644,
"reward_category_id": 3,
"sepserial_no": 0,
"sepemployee_id": 0,
"fname": "Smiles",
"emp_type": 381,
"status": "Active",
"location_name": "Corporate",
"level_id": 207,
"lname": "Administrator",
"reward_cust_id": 0,
"reward_to_userid": 644,
"corresponding_status_id": 0,
"company_id": 7,
"reward_by_userid": 644
},
{
"cin_number": 0,
"function_id": 175,
"grade_id": 147,
"role_id": 20469,
"location_id": 152,
"employee_designation": "Chief Officer Client Studio",
"bu_id": 90,
"gen_id": "GPR00082",
"reward_id": 0,
"employee_id": 741,
"reward_category_id": 1,
"sepserial_no": 0,
"sepemployee_id": 0,
"fname": "Sheena",
"emp_type": 381,
"status": "Active",
"location_name": "Bangalore",
"level_id": 178,
"lname": "Sharma",
"reward_cust_id": 0,
"reward_to_userid": 741,
"corresponding_status_id": 0,
"company_id": 7,
"reward_by_userid": 644
},
{
"cin_number": 0,
"function_id": 190,
"grade_id": 224,
"role_id": 665,
"location_id": 151,
"employee_designation": "Senior Manager - Knowledge",
"bu_id": 90,
"gen_id": "GPR00002",
"reward_id": 0,
"employee_id": 657,
"reward_category_id": 2,
"sepserial_no": 0,
"sepemployee_id": 0,
"fname": "Aishwarya",
"emp_type": 381,
"status": "Active",
"location_name": "Corporate",
"level_id": 270,
"lname": "Singh",
"reward_cust_id": 0,
"reward_to_userid": 657,
"corresponding_status_id": 0,
"company_id": 7,
"reward_by_userid": 644
}
];
On this I use :
$scope.removeDupFromList($scope.employeeRewardData);
which is
//Function to remove more than one presence of Elelments in Array
$scope.removeDupFromList = function(listObj)
{
//Function will return a value which will be true if list is completely sorted
var isListCompletelySorted=true;
//This jsonObj will basically be $scope.matchingAndSelectedEmployeesList
if(listObj!=null && listObj!=undefined && listObj.length>0)
{
for(var i=0;i<listObj.length;i++)
{
if(listObj[i]!=null && listObj[i]!=undefined)
{
for(var j=i+1;j<listObj.length;j++)
{
if(listObj[i]["employee_id"]==listObj[j]["employee_id"])
{
listObj.splice(j, 1);
isListCompletelySorted=false;
}
}
}
}
}
alert(".........."+listObj.length+"...............");
if(!isListCompletelySorted)
{
$scope.removeDupFromList(JSON.parse(JSON.stringify(listObj)));
}
else return isListCompletelySorted;
}
But when I go in this loop suddenly JSON.stringify stops working. I am unable to understand this strange behaviour of Splice.
Answer
With Underscore.JS you can do the same: (Don’t reinvent the wheel)
$scope.employeeRewardDataNew = _.uniq($scope.employeeRewardData,
function(item){
return item.employee_id;
});
Demo Fiddle
Reference:
uniq_.uniq(array, [isSorted], [iterator]) Alias: unique Produces a duplicate-free version of the array, using === to test object equality. If you know in advance that the array is sorted, passing true for isSorted will run a much faster algorithm. If you want to compute unique items based on a transformation, pass an iterator function.
_.uniq([1, 2, 1, 3, 1, 4]); => [1, 2, 3, 4]
You can get sources from http://underscorejs.org/underscore.js