title: How to get values by key in Javascript
body: <p>Is there any nifty way to get values from an array of hashes:</p>
  
  <pre>
  var foo = {a: "aFirst", b: "bFirst", c: "cFirst"};
  var boo = {a: "aSecond", b: "bSecond", c: "cSecond"};
  var bar = {a: "aThird", b: "bThird", c: "cThird"};
  var myArrOfHashes = [foo, boo, bar];
  </pre>
  
  <p>So I would expect something like:</p>
  
  <pre><code>myArrOfHashes.map(b) // =&gt; bFirst, aSecond, aThird
  </code></pre>