CODEWITHSUNDEEP
knockout.js
user1405195
user1405195

Reputation: 1681

Dependent observable to concatenate array items

http://jsfiddle.net/bWJTY/29/

Can anybody tell me where my dependent observable is going wrong?

self.FirstTwo = ko.computed(function() {
    return self.FiveFave.FaveItems[0].Name + " " + self.FiveFave.FaveItems[1].Name;    
}, self);

I just want to concatenate the first two items of an array.

Upvotes: 0

Views: 51

Answers (1)

RP Niemeyer
RP Niemeyer

Reputation: 114792

To retrieve the value of an observable, you need to call it as a function with no arguments. In your case, Name is an observable, so you would have to do:

return self.FiveFave.FaveItems[0].Name() + " " + self.FiveFave.FaveItems[1].Name();

In bindings, where you are passing a simple observable, Knockout handles unwrapping it for you, which is why you don't have to do things like text: name()

Upvotes: 1

Related Questions