title: Change A Character In A String Using Actionscript
body: <p>What is the opposite of <code>String.charAt()</code>??</p>
  
  <p>If I Have a string:</p>
  
  <p><code>var Str:String="Hello World";</code></p>
  
  <p>How do I change the 5th character, for example, from a ' ' to an '_'?</p>
  
  <p>I can GET the 5th character like this:</p>
  
  <p><code>var C:String=Str.charAt(5);</code></p>
  
  <p>But how do I SET the 5th character?</p>
  
  <p>Thanks in advance.</p>