title: Splice a string based on certain characters
body: <p>I'm looking for a way to examine only certain characters within a string. For example:</p>
  
  <pre><code>#Given the string
  s= '((hello+world))'
  s[1:')'] #This obviously doesn't work because you can only splice a string using ints
  </code></pre>
  
  <p>Basically I want the program to start at the second occurence of <code>(</code> and then from there splice until it hits the first occurence of <code>)</code>. So then maybe from there I can return it to another fucntion or whatever. Any solutions? </p>