title: match dynamic value with object.keys in object
body: <p>if It's array I can do like so myArr[0] to get the first value, but what if it's an object? says my object is like this</p>
  
  <p><code>{a: 'some value', b: 'another thing'}</code></p>
  
  <p>How can I match the first object?</p>
  
  <p><code>['a', 'b'].map(o =&gt; //match object return true)</code>
  I expect to get <code>[true, true]</code> because the array of <code>['a','b']</code> match the key value of the object.</p>