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how to use logic:Empty within c:forEach

PC Leung
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The following coding always return blank values.
If I remove logic tags, it shows values correctly.
How can I use logic:Empty inside c:forEach ?


<c:forEach items="${resultSet.rows}" var="row">
<td width="20%">
<logic:empty name="${row.usernm}">
<logic:notEmpty name="${row.usernm}">
<td width="50">
<logic:empty name="${row.usergrp}">
<logic:notEmpty name="${row.usergrp}">
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