Building the Gmail parser application

The parseEmail function is able to check 10 latest inbox threads, extract the from field and body text from unread messages, and put the gathered data in the left-most tab of the Sheet. Create the parseEmail function as listed here:

/** 
 *  Gets content of latest unread message in Gmail inbox
 *    and puts gathered data in left most tab of Sheets.
 *
 */
function parseEmail(){

  // Left most sheet/tab
  var emailSheet = SpreadsheetApp.getActiveSpreadsheet()
      .getSheets()[0];

  // Clear the entire sheet.
  emailSheet.clear();

  // Checks maximum 10 threads
  var thread = GmailApp.getInboxThreads(0,10);

  var row = 1;

  for(var thrd in thread){
    var messages = thread[thrd].getMessages();

    for (var msg in messages) {
      var message = messages[msg];

      if(message && message.isUnread())
      emailSheet.getRange(row,1).setValue(message.getFrom());

      emailSheet.getRange(row++,2)
      .setValue(message.getPlainBody())...