JSFiddle - React, Tailwind, and code Playground

by joycse06

JavaScript

var newIDs; // new IDs found from ajax

newIDs = [1,2,3,4,5];

markersArray = [{ID:1},{ID:8},{ID:2},{ID:4},{ID:6}];
console.log('Orig Array: ',markersArray);
console.log('From Server: ',newIDs);
var newMarkers = $.map(markersArray,function(obj,i){
    return $.inArray(obj.ID,newIDs) == -1? null: obj;
});

console.log('New Markers Objects: ',newMarkers);
var newMarkerIDs = $.map(markersArray,function(obj,i){
    return $.inArray(obj.ID,newIDs) == -1? null:obj.ID;
});
console.log('New Markers ID Array: ',newMarkerIDs);
var extraIDs = $.map(newIDs,function(val,i){
    return $.inArray(val,newMarkerIDs) == -1 ? val : null;
});

console.log('Extra IDs: ',extraIDs);