title: JS getting value of object with key starting with a string
body: <p>Is there a quick way to get the value of a key starting with a certain string?</p>
  
  <p>Example :</p>
  
  <pre><code>var obj = {
    "key123" : 1,
    "anotherkey" : 2
  }
  
  obj['key1'] // would return 1
  obj['ano'] // would return 2
  </code></pre>
  
  <p>Thanks</p>