title: Concatenate 2 Julia Arrays without modifying them
body: <p>I would like to concatenate 2 arrays.</p>
  
  <pre><code>julia&gt; l1=["a","b"]
  2-element Array{ASCIIString,1}:
   "a"
   "b"
  
  julia&gt; l2=["c","d"]
  2-element Array{ASCIIString,1}:
   "c"
   "d"
  </code></pre>
  
  <p><code>append!</code> can do this but this function is modifying <code>l1</code> (that's a function named with a <code>!</code>)</p>
  
  <pre><code>julia&gt; append!(l1, l2)
  4-element Array{ASCIIString,1}:
   "a"
   "b"
   "c"
   "d"
  
  julia&gt; l1
  4-element Array{ASCIIString,1}:
   "a"
   "b"
   "c"
   "d"
  </code></pre>
  
  <p>I was looking for a <code>append</code> function (without exclamation point).</p>
  
  <p>But such a function doesn't seems to exist.</p>
  
  <p>Any idea ?</p>