Removing duplicates from an array

Question

Robert, et al

On further testing (click on the 3rd button "city models") I see that there are duplicates in my object ids which are being used to create the countries layer.  This causing my application to run slow.  A look at the console.log of the featureCollection on line 300 rquery.run(function(error, featureCollection, response) will show what I mean

Is there a way to remove the duplicates (so there is only one objectid per country) before the layer is added to my map?

Spec attached

robexam.html.zip

joepublic · Answer

Thanks Rene!!

I work with this and let you know if I still problems

Chris

RRubalcava · Answer

The above examples could be tweaked a little for that.

That's a quick and dirty way of doing it based on the example Ken provided.

joepublic · Answer

Thanks for the suggestions Ken.

But my question is for a specific case.

The problem is here: rquery.objectIds();... This creates an

array of opjectIds with dupes.

I am trying to  remove the dupes before I pass the array to :

countries = L.geoJson(featureCollection).addTo(map);