Extjs 4.2: get value from the grid

Question

So let's say I have this grid

id time

1 10

2 5

3 10

etc..

How do I get the sum of the values under 'time'?

EDIT

I tried to get the array of the value from the grid with this code

var sel2 = scope.getPlaylistDetailsGrid().data.items;

But it says: Uncaught TypeError: Cannot read property 'items' of undefined

Answer 1

If you want to display the sum in the grid, then Riku's suggestion of the summary row is perfect. If you need to just get a sum in code, you can check out the store's sum() method: http://docs.sencha.com/extjs/4.2.2/#!/api/Ext.data.Store-method-sum

Riku's suggestion:

Answer 2

I think it would be usefull for others if i point it out as an answer.

You could use summary row, to achieve this behaviour. Here is example