var indexLayers = {}, layers = result.layers; for (var i = 0, len = layers.length;, i < len, i++) { var layer = layers; indexLayers[layer.name] = layer.id; } // now you can use indexLayers in your app to do the correct referencing // when needed layer.setVisibleLayers([indexLayers.Parcels, indexLayers['Building Footprints']]);