Updating Vue data array items

[adamgd]

I am trying to update array items in a Vue data object. I have tried using v-model:

http://jsfiddle.net/obomoboe/HM9rn/1/

and have tried specifying a handler so that I can be specific about what I am assigning from/to:

http://jsfiddle.net/obomoboe/HM9rn/2/

Neither one will update $data. When I look in the debugger at the update method, both values evaluate as I would expect them to, but it still doesn't seem to update the VM. I'm sure I've missed the point, but where?

[adamgd]

Meant to post in FAQ. Apologies...