title: How can I initiate a list with a list element in julia?
body: <p>I want to make a list of list in julia. It should be like this:</p>
  
  <pre><code>a = [1,"char", [1, 2, 3]]
  a[3]
  # ouput should be [1,2,3]
  </code></pre>
  
  <p>However, julia automatically does concatenation, so it ends up to be <code>[1, "char", 1, 2, 3]</code></p>
  
  <p>How can I do such things in julia without initiating the list with another value and then assigning a list to it like:</p>
  
  <pre><code>a = [1, "char", 3]
  a[3] = [1, 2, 3]
  </code></pre>