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conditional iteration [message #58111]

Tue, 10 March 2009 19:47

Guadalupe Mising name

Messages: 35
Registered: July 2009

Member

Hi all,
I want to make a list of elements separated from comas from a set of
elements name of a specific type with a specific value. (lets say all "a"
elements whose type value is not "b").

I use an iteration to select all "a" elements and a Choose inside it to
select all those elements whose type value is b and I only print in the
otherwise option.

If I use the delimiter in the iteration I also get a comma for b elements,
though they are not printed.

Is there any option to put a condition in the iteration?

Btw, is there any way to know how many elements and iteration has
collected?

Thanks a lot for your answers

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Re: conditional iteration [message #58161 is a reply to message #58111]

Tue, 10 March 2009 20:36

Paul Elder

Messages: 849
Registered: July 2009

Senior Member

How about this:

<c:iterate select="$yourContextHere/a[not(@type = 'b')]" var="a"
delimiter=", ">
<c:get select="$a"/>
</c:iterate>

The expression in square brackets is an XPath 'predicate'. It is relative
to the step it follows, and filters selected nodes that do not meet
satisfy the expression.

Paul

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