traversing tables with selenium/webdriverjs - arrays

Question

I want to traverse table with Selenium using Node and webdriverJS:
<table>
<tr>
<td class="name">Peter</td>
<td class="count">1</td>
</tr>
<tr>
<td class="name">John</td>
<td class="count">3</td>
</tr>
</table>
I want for every row to look at the names and the rows cells.
What I have:
driver.findElements(By.tagName('tr')).then(function(rows){
// for every row
for (var i = 0; i< rows.length; i++){
// check the name cell
rows[i].findElement(By.class('name')).getInnerHtml().then(function(name){
// do some stuff
});
// check the count cell
rows[i].findElement(By.class('count')).getInnerHtml().then(function(count){
// do some stuff
});
}
});
This works for the first some rows, but with many rows it fails at a certain point.
My theory: the findElement calls in the for-loop are passed to the manager, then the for-loop finishes. Then the garbage collector removes the rows array. Once the manager executes the the findElement calls, the array and its elements do not exist anymore and fail. The error I get is:
StaleElementReferenceException : The Element is not Attached to the DOM
It does work for the first row as the array still exists early-on in the execution.
My questions:
what am I doing wrong?
Is my theory correct?
How can I bind the row[i] references to the findElement calls for them to persist longer than the original array?
---- Edit ----
When I remove one of the inner findElement calls and only look for one cell per row, I am able to cover more rows. This made me think that, with this implementation, time plays a role. This should not be the case, so I am doing probably something wrong.
Is there anything like a forEach function in Selenium?

Answer 1

I found the problem:
I am using a website implemented with Sencha EXTjs.
The table is created on top of a data store: Apparently, the store is called twice and the whole table is recreated in-between the calls.
So I somehow have to wait until the table has loaded for the second time...
This will be the next challenge.