Filter Duplicates in JSON Array Of Objects

Filter Duplicates in JSON Array Of Objects

I come across a scenario where my JSON array of object returns some thousands of objects  in which I should identify the duplicates, and eliminate it so that my JSON object array must have unique entries.

To resolve it I written one smart function , this takes the JSON Array of objects and eliminates the duplicates and returns the JSON array of unique objects.

The beauty is it’s a client side JavaScript function.

<script language="javascript" type="text/javascript">

function returnMeUniqueJSONArray(obj) {

        var uniques = [];

        var stringify = {};

        for (var i = 0; i < obj.length; i++) {

            var keys = Object.keys(obj[i]);

            keys.sort(function (a, b) { return a - b });

            var str = '';

            for (var j = 0; j < keys.length; j++) {

                if (j == 3 || j == 8) {

 //I need to compare fields at (postion3) & (postion8) , both should not be unique, if you want to compare entire object then remove this if condition

                    str += JSON.stringify(keys[j]);

                    str += JSON.stringify(obj[i][keys[j]]);

                }

            }

            if (!stringify.hasOwnProperty(str)) {

                uniques.push(obj[i]);

                stringify[str] = true;

            }

        }

        return uniques;

    }

</script>

Usage: 

var actualJSONArrayWithDuplicates = jsonArrayOfObjects;      

var actualJSONArrayWithOutDuplicates = returnMeUniqueJSONArray(jsonArrayOfObjects);

actualJSONArrayWithDuplicates is the Json array of Objects with unique records..

Hope you benefited…