title: replace a string partially with something else
body: <p>lets say I have this image address like</p>
  
  <pre><code>https://firebasestorage.googleapis.com/v0/b/myproj-d.appspot.com/o/FILE_NAME.jpg?alt=media&amp;token=124bb2bf-c6ef-432b-92c7-7032563ba31b
  </code></pre>
  
  <p>how is it possible to replace FILE_NAME.jpg with THUMB_FILE_NAME.jpg
  Note: FILE_NAME and THUMB_FILE_NAME are not static and fix.</p>
  
  <p>the FILE_NAME is not fixed and I can't use string.replace method.
  eventually I don't know the File_Name</p>