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Groovy/Grails - Need to retrieve List index value

I need to retrieve the index position of each value in a list I have. I'm doing this so that I can display a gsp table with alternating row background colors. For example:

(list.indexVal % 2) == 1 ? 'odd' : 'even'

How can I get the index position number of each item in a Groovy list? Thanks!

Solution

  • According the documentation, the g:each tag in the gsp view allows the "status" variable where grails store the iteration index in. Example:

    <tbody>
  <g:each status="i" in="${itemList}" var="item">
    <!-- Alternate CSS classes for the rows. -->
    <tr class="${ (i % 2) == 0 ? 'a' : 'b'}">
      <td>${item.id?.encodeAsHTML()}</td>
      <td>${item.parentId?.encodeAsHTML()}</td>
      <td>${item.type?.encodeAsHTML()}</td>
      <td>${item.status?.encodeAsHTML()}</td>
    </tr>
  </g:each>
</tbody>