title: create an array from elements in a string, elemets start with certain key/sign
body: <p>I want to abstract an array with text strings that reside in a text, each text element starts with a certain sign or key e.g. $ or &amp;. how can I achieve this?</p>
  
  <p>so "$Huey, $Dewey, and $Louie all live in Duckcity. $Goofy and $Mickey live there too." should result in </p>
  
  <pre><code>string characters = {"Heuy","Dewey", "Louie", "Goofy","Mickey"};
  </code></pre>