How to implement select/deselect all checkbox

[greengiant]

I want to present a list of options to the user with a checkbox next
to each item to allow the user to indicate they would like to select
that item. I would also like to provide a "select/deselect all"
checkbox in the ui that when clicked with select all the items. What
is the best way to do that with knockout

Here is an example:
http://jsfiddle.net/greengiant83/awgph/

[beic...@gmail.com]

That sounds quite similar to a question that was posted a few days ago.  You may want to take a look at that discussion:
[nested dependent observables]
(https://groups.google.com/forum/#!topic/knockoutjs/5j1s5zg8ivg)

[rpn]

Here is one way that you could implement the "select/deselect all" scenario: http://jsfiddle.net/rniemeyer/kXYuU/

The model is slightly different to take advantage of how the checked binding can work with arrays, but you could make it work with your model as well.