title: Find letter in a String (charAt)
body: <p>I'm learning Dart now, and I was wondering how I can find  letters in a String. I've tried to use <code>charAt()</code>, but then the Dart Editor says:</p>
  
  <blockquote>
    <p>Class 'String' has no instance method 'charAt'.</p>
  </blockquote>
  
  <p>So my question is: How can I find letters in a String in Dart?</p>
  
  <p>For example, I want to find the <code>"i"</code> in the word <code>"fire"</code>. How does this work without <code>charAt()</code>?</p>
  
  
  
  <pre class="lang-dart prettyprint-override"><code>var items = "fire";
  
  for (int i = 0; items.length; i++) {
    if (items.indexOf(items(charAt(i)) != -1) {
      //..
    }
  }    
  </code></pre>