title: How to map a function on the elements of a nested list
body: <p>This is a trival question.</p>
  
  <p>But what is the standard way to map a function (<code>+1</code> in this example) on nested list?</p>
  
  <pre><code>map (\x -&gt; map (+1) x) [[1,2,3],[4,5,6]]
  </code></pre>
  
  <p>I use the above way in my code, but what is a good way to do that? Is there something like a <code>mapNested (+1) [[1,2,3],[4,5,6]]</code> or similar? I used google and hoogle but got too much generic results.</p>