[Struts-user] How to iterate over two collections ?

You could loop over one collection, exposing the varStatus, which
contains the key, and use the key to look up in the second map ... I think?

Vinita Keswani wrote:

With JSTL:

<c:forEach var="entry" items="${costMap}">
<c:out value="${entry.value}"/>
<c:out value="${volMap[entry.key]}"/>
</c:forEach>

Quoting Brice Ruth <bruth@fiskars.com>:

Thanks but in any case I have to create an iterator to loop thru the maps.What I want to do is to have one loop and to pick up value entries from another - yes may be I can try using lookups using key???

Kris Schneider wrote:With JSTL:






Quoting Brice Ruth
:

I think the code I provided does what you were asking for, but maybe I'm missing
something. Perhaps adding comments to my example will help:

<%-- iterate through costMap, "entry" will be an instance of Map.Entry --%>
<%-- Map.Entry exposes two properties: "key" and "value" --%>
<c:forEach var="entry" items="${costMap}">

<%-- output value for costMap entry --%>
<c:out value="${entry.value}"/>

<%-- output value for volMap entry --%>
<c:out value="${volMap[entry.key]}"/>

</c:forEach>

Quoting Vinita Keswani <vinitakeswani@yahoo.com>:

Thanks again...

Yes I have to lookup using the key ..that will work fine..Thanks again.

Kris Schneider wrote:
I think the code I provided does what you were asking for, but maybe I'm missing
something. Perhaps adding comments to my example will help:













Quoting Vinita Keswani :

Here's an example using JSTL that I just tested...

<%
java.util.HashMap costMap = new java.util.HashMap();
costMap.put( "foo", "costFoo" );
costMap.put( "bar", "costBar" );

java.util.HashMap volMap = new java.util.HashMap();
volMap.put( "foo", "volFoo" );
volMap.put( "bar", "volBar" );

pageContext.setAttribute("costMap", costMap );
pageContext.setAttribute("volMap", volMap );
%>

<c:forEach items="${costMap}" var="costItem">
Cost Desc: <c:out value="${costItem.key}"/><br>
Cost Value: <c:out value="${costItem.value}"/><br>
Vol Value: <c:out value="${volMap[costItem.key]}"/><br>
----<br>
</c:forEach>