title: how strip commas from string in Elixir?
body: <p>I wonder how to remove commas from given string. My try was:</p>
  
  <pre><code>st = "1,2,3"
  String.strip(st, ?,)
  #=&gt; "1,2,3"
  </code></pre>
  
  <p>What am I doing wrong?</p>