title: Merge array of objects by object key
body: <p><a href="https://i.stack.imgur.com/6T9TT.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/6T9TT.png" alt=""></a></p>
  
  <p>Given the screenshot above I would like to merge this array by the "hand" attribute, so that the final result would be</p>
  
  <pre><code>[{hand: "KdAhAsKs", checkPct: 28, betPct: 72},{hand: "KcAhAsKs", checkPct: 28, betPct: 72}]
  </code></pre>