title: In Kotlin, how to check contains one or another value?
body: <p>In Kotlin we can do:</p>
  
  <pre><code>val arr = intArrayOf(1,2,3)
  if (2 in arr)
     println("in list")
  </code></pre>
  
  <p>But if I want to check if 2 <em>or</em> 3 are in <code>arr</code>, what is the most idiomatic way to do it other than:</p>
  
  <pre><code>if (2 in arr || 3 in arr)
     println("in list")
  </code></pre>