title: Namespace object by its name
body: <p>Is there a way to get namespace object by its name? For example: </p>
  
  <pre><code>(def ns-symbol (ns-name *ns*))          ;; get namespace name as symbol
  (def ns-object (ns-by-name ns-as-str))  ;; convert it back to namespace object
  </code></pre>
  
  <p>So in this example I need function <code>ns-by-name</code>. </p>