Wouldn't something like:
#set ($list = [])
#foreach($employee in $employeeList)
#set ($dept = $employee.getDepartment())
#if (! $list.contains($dept)) {
#set ($dummy = $list.add($dept))
#endif
#end
$list would then contain a list of all the unique department numbers (for
example)
John Withers
-----Original Message-----
From: Mike Kienenberger [mailto:[EMAIL PROTECTED]
Sent: Monday, October 03, 2005 4:04 PM
To: Velocity Users List
Subject: Re: Clean way to iterate over a distinct set of items?
Thanks. Creating a HashSet was my first thought at well, but I
couldn't remember the syntax, nor under what situations it was allowed
:)
What I have works, and while it's ugly, it's good enough :) If I'd
seen the newInstance() example first, I would have went with that,
though.
And congrats, Nathan! Your addition to the core velocity
contributors has been a long time coming!
On 10/3/05, Nathan Bubna <[EMAIL PROTECTED]> wrote:
> well, since Will's proposed security enhancements haven't yet arrived,
> why not do something like:
>
> #set( $set = $anything.class.forName('java.util.HashSet').newInstance() )
> #foreach( $thing in $list )##
> $!set.add($thing.subThing)##
> #end
> #foreach( $subThing in $set )
> $subThing
> #end
>
> :)
>
> On 10/3/05, Mike Kienenberger <[EMAIL PROTECTED]> wrote:
> > Yes, the problem is that I don't have access to the context in this
> > situation, only to the template. I needed a 100% VTL solution since I
> > couldn't add anything to the context.
> >
> > On 10/3/05, Will Glass-Husain <[EMAIL PROTECTED]> wrote:
> > > Myself, I usually do this in the controller and pass the unique list
to
> > > Velocity. More often I have a single object (e.g. $form) and just
make a
> > > method that translates:
> > >
> > > $form.employeeList
> > > $form.uniqueEmployeeList
> > >
> > > each method drawing from the same original data source.
> > >
> > > WILL
> > >
> > > ----- Original Message -----
> > > From: "Mike Kienenberger" <[EMAIL PROTECTED]>
> > > To: "Velocity Users List" <velocity-user@jakarta.apache.org>
> > > Sent: Monday, October 03, 2005 12:14 PM
> > > Subject: Clean way to iterate over a distinct set of items?
> > >
> > >
> > > I'm looking for a clean way to iterate over a distinct set of items.
> > >
> > > As an example. consider
> > >
> > > #foreach $employee in $employeeList
> > >
> > > where $employee.getDepartment() may or may not return a unique value.
> > >
> > > What I really want to iterate over is the unique set of departments in
> > > the employee list.
> > >
> > > Ideas?
> > >
> > > And this isn't really what I'm trying to do -- the real example is
> > > much more complicated, and there's no easy way to add a tool to the
> > > context so that I could have the equivalent of
> > > $tool.getUniqueDepartmentsForEmployeeList($employeeList).
> > >
> > > -Mike
> > >
> > > ---------------------------------------------------------------------
> > > To unsubscribe, e-mail: [EMAIL PROTECTED]
> > > For additional commands, e-mail: [EMAIL PROTECTED]
> > >
> > >
> >
> > ---------------------------------------------------------------------
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> > For additional commands, e-mail: [EMAIL PROTECTED]
> >
> >
>
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