recursionExample.js

function findMostRecent(folder){

  var mostRecent = null
  var contentList = getFolderContentList(folder.path);

  for(var i = 0; i < contentList.length; ++i){

    if(contentList[i].type === 'file' && 
       (mostRecent === null || contentList[i].date > mostRecent.date)){
      mostRecent = contentList[i];
    }
    else if(contentList[i].type === 'folder'){
      var subMostRecent = findMostRecent(contentList[i]); //Recursion right there
      if( (subMostRecent && mostRecent === null) || 
          (subMostRecent.date > mostRecent.date) ){
            mostRecent = subMostRecent;
      }
    }
  }

  return mostRecent;
}