Well, there is subtlety involved, but it's in how JSTL handles a Map versus a JavaBean. In the case of a Map, if "value" evaluates to null, the entry is removed from the Map. In the case of a JavaBean, the property is set to null.
Quoting "Siggelkow, Bill" <[EMAIL PROTECTED]>: > There is a subtle difference here -- using the <c:set ...> method I think it > will actually set the Map value to null but the key will still be there. > Whereas doing the explicity Map.remove() will actually remove the map > entry. > > -----Original Message----- > From: Kris Schneider [mailto:[EMAIL PROTECTED] > Sent: Monday, August 11, 2003 12:21 PM > To: Tag Libraries Users List; [EMAIL PROTECTED] > Subject: Re: Removing a value from a map present in Session > > > With JSTL: > > <c:set target="${sessionScope.map}" property="name" value="${null}"/> > > Quoting shanmugampl <[EMAIL PROTECTED]>: > > > Hi, > > > > I have a map in session scope which contains an entry with key > > "name". I want to remove that entry from the map > > > > <%= ((Map)session.getAttribute("map")).remove("name") %> > > > > How do i achieve this in jstl el ? > > > > Thanks > > Shanmugam PL > > -- > Kris Schneider <mailto:[EMAIL PROTECTED]> > D.O.Tech <http://www.dotech.com/> -- Kris Schneider <mailto:[EMAIL PROTECTED]> D.O.Tech <http://www.dotech.com/> --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
