title: Erlang : flattening a list of strings
body: <p>I have a list like this:</p>
  
  <pre><code>[["str1","str2"],["str3","str4"],["str5","str6"]]
  </code></pre>
  
  <p>And I need to convert it to </p>
  
  <pre><code>["str1", "str2", "str3", "str4", "str5", "str6"]
  </code></pre>
  
  <p>How do I do this?</p>
  
  <p>The problem is that I'm dealing with lists of strings, so when I do </p>
  
  <pre><code>lists:flatten([["str1","str2"],["str3","str4"],["str5","str6"]])
  </code></pre>
  
  <p>I get</p>
  
  <pre><code>"str1str2str3str4str5str6"
  </code></pre>
  
  <p>However, if the elements of the original list where just atoms, then <code>lists:flatten</code> would have given me what I needed. How do I achieve the same with strings?</p>