How do I find duplicates names in json array and should give alert in jquery

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JSON

how to find duplicates in json array

Posted 1-Jun-16 0:14am

Member 12559011

Updated 13-Jul-16 2:25am

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Karthik_Mahalingam 1-Jun-16 8:03am

what is the json format,
post sample json data

Karthik_Mahalingam 1-Jun-16 8:49am

this doesnt look like json.

Karthik_Mahalingam 1-Jun-16 9:32am

ok,

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FrostedSyntax · Answer 1 · 2016-06-01T23:29:00

First of all, I don't know why copying and pasting JSON markup was such a hard task but oh well I'll do my best with what you provided. In your example code you use the variable name "i" for the first loop but then refer to it inside the loop as "i1" so that would cause problems. Also it is a good idea to use the jQuery method parseJSON for compatibility reasons. Based on what you asked and the examples you provided it seems that you want to check the optionname value to make sure it is unique. You could create an array of the option names as you iterate your loops:

JavaScript

var parsed = $.parseJSON(jsonString);
var allNames = [];
for(var i in parsed.menus)
{
   for(var j in parsed.menus[i].menuoptions)
    {
        var name = parsed.menus[i].menuoptions[j].optionname;
       if(!allNames.includes(name))
        {
            allNames.push(parsed.menus[i].menuoptions[j].optionname);
        }
        else
        {
            // duplicate found
        }
    }
}

and then handle duplicates however you were going to.

Zafar Sultan · Answer 2 · 2016-06-02T00:07:00

Can't decide if your JSON is invalid or I have no idea of JSON? Anyways, if you have valid JSON and want to find unique objects from array use the following code:

JavaScript

var optionsList = [{
                "optionName": "Cricket",
                "optionupdate": "new"

            }, {
                "optionName": "Cricket",
                "optionupdate": "new"
            }, {
                "optionName": "Football",
                "optionupdate": "new"
            }, {
                "optionName": "Basketball",
                "optionupdate": "new"
            }, {
                "optionName": "Basketball",
                "optionupdate": "new"
            }, {
                "optionName": "Hockey",
                "optionupdate": "new"
            }];
            var tempArray = [],
            uniqueValueCollection = [];

            $.each(optionsList, function (index, value) {
                if ($.inArray(value.optionName, tempArray) === -1) {//Check if the object is in tempArray or not. If it is not put in in tempArray and also into uniqueValueCollection. If it is there in the tempArray, skip to the next object.
                    tempArray.push(value.optionName);
                    uniqueValueCollection.push(value);
                }
            });
            var result = JSON.stringify(uniqueValueCollection);

Here the result variable will have unique objects(based on optionName) as a string.

Hope it helps.

How do I find duplicates names in json array and should give alert in jquery

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