title: Find the indices of the odd numbers in an integer vector
body: <p>Say we have some vector:</p>
  
  <pre><code>someVector = c(1, 3, 4, 6, 3, 9, 2, -5, -2)
  </code></pre>
  
  <p>I want to get a vector that has the locations in <code>someVector</code> of all the odd elements</p>
  
  <p>so in this case it would look like...</p>
  
  <pre><code>resultVector = c(1, 2, 5, 6, 8)
  </code></pre>