title: QT: Finding and replacing text in a file
body: <p>I need to find and replace some text in the text file. I've googled and found out that easiest way is to read all data from file to QStringList, find and replace exact line with text and then write all data back to my file. Is it the shortest way? Can you provide some example, please.
  UPD1 my solution is:</p>
  
  <pre><code>QString autorun;
  QStringList listAuto;
  QFile fileAutorun("./autorun.sh");
  if(fileAutorun.open(QFile::ReadWrite  |QFile::Text))
  {
      while(!fileAutorun.atEnd()) 
      {
          autorun += fileAutorun.readLine();
      }
      listAuto = autorun.split("\n");
      int indexAPP = listAuto.indexOf(QRegExp("*APPLICATION*",Qt::CaseSensitive,QRegExp::Wildcard)); //searching for string with *APPLICATION* wildcard
      listAuto[indexAPP] = *(app); //replacing string on QString* app
      autorun = ""; 
      autorun = listAuto.join("\n"); // from QStringList to QString
      fileAutorun.seek(0);
      QTextStream out(&amp;fileAutorun);
      out &lt;&lt; autorun; //writing to the same file
      fileAutorun.close();
  }
  else
  {
      qDebug() &lt;&lt; "cannot read the file!";
  }
  </code></pre>