title: Apply the same function to multiple jQuery objects without reselct them
body: <p>I use to declare all the objects I need at the top of my functions, which I use to cache and keep the app fast. For example I have something like: </p>
  
  <pre><code>var $object1 = $('#my_element'),
      $object2 = $('.other_elements'),
      $object3 = $('.again_something_else');
  </code></pre>
  
  <p>I use those variables in the code individually, so for example <code>$object1.doSomething()</code> or <code>$object2.doElse()</code> but in some scenarios I need to apply the same function to two or more already selected variables. There is a way to merge those variables together, to avoid re-selecting of the elements I need? </p>
  
  <p>I would avoid this:</p>
  
  <pre><code> $('#my_element, .other_elements').myFunction()
  </code></pre>
  
  <p>and reuse the variables I have already.</p>