Remove Duplicate Items From Multidimensional Array Using Javascript, jQuery, & underscore.js -

i have web page uses jquery fetch data json file contains location name, latitude, , longitude. push retrieved data array.

 var weathersites = [];  function weather() {     $.getjson('json/locs.json', function(data) {       $.each(data.locations, function() {        var locationlatitude = this.latitude;        var locationlongitude = this.longitude;        var locationname = this.location;        // -- if latitude , longitude 0,0 skip next iteration --             if (locationtlatitude == +0 || locationlatitude == -0 && locationlongitude == +0 || locationlongitude == -0) {                 return true;             }         // populate array site name, latitude, , longitude               weathersites.push({name: locationname, latitude: locationlatitude, longitude: locationlongitude});      });   });    };  

the code retrieves data , populates array required. however, there number of locationname items same, though locationlatitude and/or locationlongitude different. need remove array elements locationnames same, regardless of latitude or longitude.

i have tried using number of methods seen here have had no luck. example:

function removedupes() {         var uniques = _.map(_.groupby(weathersites,function(doc){           return doc.id;         }),function(grouped){           return grouped[0];         }); 

this example requires underscore.js. did not work me. new programming , gis in general. appreciate answer contains full code necessary , logic behind happening. helpful me , of course me learn.

thank help.

the open source project http://www.jinqjs.com can it. here github link: github

var results = jinqjs()                   .from(data1)                   .groupby('locationname')                   .max('locationlatitude', 'locationlongitude')                   .select(); 

let me know if need working examples.