request-promise_first_one.js

var getzips = function(lat, lng) {
   			return new Promise((resolve, reject) => {
   				geocode.reverseGeocode(lat, lng, (err, data) => {
      				if (err) { reject(err); }			
			 	 		var result = data.results[0].address_components[6].short_name;
		      	 			resolve(result);
							});
		   				});
		   			};
		   	
		Promise.all(lat_lng.lat.map((_,index) => {      
   			return getzips(lat_lng.lat[index],lat_lng.lng[index]);
   				})
		   	).then((data) => {
		   		var zips = _.union(data);
		   		 console.log('These are the zip codes',zips);
		   	});		   	
   		})
   		 .finally(() => {
   			console.log('We are finally done here');