title: How do I set multiple values in a Javascript Map at once?
body: <p>I have a simple chain of logic here, where bigCities is a Javascript Map. In this example, d represents each object in an array of data read in from a csv file. For every object's city property, I'm assigning it's d.pop value (the population of the city).</p>
  
  <p><code>bigCities.set(d.city, +d.pop)</code></p>
  
  <p>What if I want to be able to set multiple values at once? Would the code look something like this:</p>
  
  <pre><code>bigCities.set(d.city, ["population": +d.pop, "latitude": +d.lat, "longtitude": +d.lng)
  </code></pre>
  
  <p>Is it possible to create a key value pair in a Javascript Map, where the value is an array of data? If so, how would I write the above example correctly?</p>