title: How to find the difference between two slices of strings
body: <p>Here is my desired outcome</p>
  
  <pre><code>slice1 := []string{"foo", "bar","hello"}
  slice2 := []string{"foo", "bar"}
  
  difference(slice1, slice2)
  =&gt; ["hello"]
  </code></pre>
  
  <p>I am looking for the difference between the two string slices!</p>