Adding NSArrays to NSDictionary - iphone

Question

I am parsing a XML file with a format of:
**NOTE: This is a very simplified version of the XML. There are 11 divisions, and 87 departments total
<division>
<name> Sciences </name>
<departments>
<department>
<name> Computer Science </name>
</department>
<department>
<name> Biology </name>
</department>
<department>
<name> Chemistry </name>
</department>
</department>
</division>
What I am hoping to do is display this info in a UITableView, with Division names as the Sections, and the department names within each appropriate section.
I have a NSDictionary called divisionDict which I want to store NSArrays for each division; containing the departments. I also have a NSMutableArray called departmentArray, which contains each of the departments. So essentially, I want a divisionDict filled with departmentArrays.
Here is my code for parsing the XML, which works perfect, I am just having trouble storing separate arrays in the dictionary. When it goes through the parse now, and I try to print out the elements in the array with key "Sciences", it prints the departments for every division, not just the Sciences.
if(node_divisions)
{
node_division = [TBXML childElementNamed:#"division" parentElement:node_divisions];
while (node_division)
{
node_divisionName = [TBXML childElementNamed:#"name" parentElement:node_division];];
node_departments = [TBXML childElementNamed:#"departments" parentElement:node_division];
node_department = [TBXML childElementNamed:#"department" parentElement:node_departments];
divisionName = [TBXML textForElement:node_divisionName];
while(node_department)
{
node_departmentName = [TBXML childElementNamed:#"name" parentElement:node_department];
departmentName = [TBXML textForElement:node_departmentName];
//add the department name to the array
[departmentArray addObject:departmentName];
node_department = node_department->nextSibling;
}
//add the departmentArray to the dictionary, using the division name as the key
[divisionDict setObject:departmentArray forKey:divisionName];;
node_division = node_division->nextSibling;
}
}
Any help is greatly appreciated!!! I know its something simple I am missing probably but I have been looking at this for too many hours now and I just can't see it. If you need any other info, just let me know, I tried to explain everything in detail.
Also, here is a picture that hopefully helps show what I am trying to describe:
http://i.stack.imgur.com/a9nSb.png

Answer 1

It looks like you're adding all of the departments for each division to the same array. I think you just need to create a new array for each division in the loop:
while (node_division)
{
departmentArray = [NSMutableArray array]; //add this line