foreach looping and counting

[Marko Debac]

Hello cowboys,

I have a problem with creating dinamic table where every second row must has same colour, with jstl ofcourse;

so I have

<table>
 
 int i = 0; 
<c:forEach var="foo" items="${fooList}" >
 
 i++; 
 
<tr  if ( i%2==0 ) class="red_row" >${foo} </tr>
 
</c:forEach>
 
</table>
    

class="red_row" is defined in css.

Can it be done somehow with pure jstl, with no scripting code?

Regardes,
Marko

[Bear Bibeault]

Yes.

Do you have a copy of the JSTL Specification handy? If not, you should.

When you get it, look up the varStatus attribute to <c:forEach>.

You will be pleased.

[Marko Debac]

Hi Bear,

but varStatus is a String, I canot use him like "i", i.e. I canot do mod operation on him, so I cant get it, I have download jstl spec, bat its very poor explanation, with no examples

help

[Ben Souther]

Originally posted by Marko Debac:
Hi Bear,

but varStatus is a String, I canot use him like "i", i.e. I canot do mod operation on him, so I cant get it, I have download jstl spec, bat its very poor explanation, with no examples

help

From the JSTL Spec:

Chapter 6 Iterator Actions 39
6.1.3 Iteration Status
<c:forEach> also exposes information relative to the iteration taking place. The example below creates an HTML table with the first column containing
the position of the item in the collection, and the second containing the name of the product.

See Chapter 16 �Java APIs" for details on the LoopTagStatus interface exposed by the varStatus attribute.

<table>
  <c:forEach var=�product� items=�${products}� varStatus=�status�>
    <tr>
      <td>${status.count}�</td>
      <td>${product.name}�</td>
    </tr>
  </c:forEach>
</table>

[Ben Souther]

varStatus is an object with properties like count and index.

[Christophe Verré]

Maybe we have different spec. Mine is very clear

varStatus
Name of the exported scoped variable for the status of the iteration. Object exported is of type
javax.servlet.jsp.jstl.core.LoopTagStatus. This scoped variable has nested visibility.


Now if you look at the JSTL API, you'll find more about LoopTagStatus:
http://java.sun.com/products/jsp/jstl/1.1/docs/api/index.html

[Marko Debac]

Thank you guys a lot!

Marko