title: How to slice a string using a delimiter
body: <p>In Go, if I have a string variable s:</p>
  
  <pre><code>var s string = "a,b,c,d,e"
  </code></pre>
  
  <p>How can I convert or split or explode it into a slice or an array of strings so that it will become:</p>
  
  <pre><code>arr[0] = "a"
  ...
  arr[4] = "e"
  </code></pre>