title: is there $(document).find('selector') and $('selector') difference
body: <p>I've  started  working on some project and in  code I  find combintions  of $(document).find('selector') and  $('selector'). I  cant  find any  real  reason why this is done. I  there any  significant  differnece between  those two so that  they are  used simultaneously in project? should I prefer one before another in some cases?</p>