app.js

const request = require('request');
const yargs = require('yargs');
const geocode = require('./geocode/geocode');
const weather = require('./weather/weather');
const argv = yargs
      .options({
        a: {
          demand: true,
          alias: 'address',
          describe: 'Address to fetch weather for',
          string: true
        }
      })
      .help()
      .alias('help', 'h')
      .argv;

geocode.geocodeAddress(argv.address, (errorMessage, results) => {
  if (errorMessage) {
    console.log(errorMessage);
  } else {
    weather.getWeather(results.latitude, results.longitude, (errorMessage, weatherResults) => {
      if (errorMessage) {
        console.log(errorMessage);
      } else {
        console.log(`It's currently ${weatherResults.temperature}. It feels like ${weatherResults.apparentTemperature}`);
      }
    })
    console.log(JSON.stringify(results, undefined, 2));
  }
});

//lat, lng, callback
weather.getWeather(37.8267, -122.4233, (errorMessage, weatherResults) => {
  if (errorMessage) {
    console.log(errorMessage);
  } else {
    console.log(JSON.stringify(weatherResults, undefined, 2));
  }
});