Async mapi calls with js

gistfile1.js

var request = require('superagent');
var async = require('async');
var _ = require('lodash');

console.time('Execution Time');

baseUrl = "http://dev.mapi.move.com/properties/v1/search/"

limit = 20

var params = {
  client_id: "doorsteps",
  rental: "true",
  listing_type: "rental",
  map_friendly: true,
  loc: 10010,
  sort: "completeness,photos,freshest",
  baths_min: 1,
  price_max: 20000,
  limit: limit,
}

var parallelRequests = [];

_.times(10, function(n){
  parallelRequests.push(
    function(callback){

      params.offset = (n+1)*limit;

      request.get(baseUrl)
        .set('Accept-Encoding', 'gzip, deflate')
        .set('Accept', 'application/json')
        .query(params)
        .end(function(err, res){
          if ( err ) {
            return callback(err);
          } else {
            return callback(null, res.body);
          }
        });
        
    }
  );
});

async.parallel(parallelRequests, function(err, resultsArray){
  var combinedListings = resultsArray.map(function(result){
    return result.listings;
  }).reduce(function(prev, current) {
    return prev.concat(current);
  }, []);
  console.timeEnd('Execution Time');
  console.log('Listing count: ', combinedListings.length);
});