title: finding an object by key using lodash
body: <p>I have a json object like this </p>
  
  <pre><code>var variable =  {     
    a : { },
    b : { }     
  };
  </code></pre>
  
  <p>Using lodash how to get only [{ a: {} }] as result. Basically how to find an object inside list of objects using key.</p>