When should I use parentheses in knockout

Question

I am a beginner in Knockout and I must say I often get confused regarding when to use (). Is there any general tip/trick regarding when would you use ()

Answer 1

Basically whenever you're working with an observable value (array or otherwise) you should use the parentheses to get the value and set the value.

var something = ko.obserbable();
something(5); //set value
console.log(something()); //get value: 5

The reason being that most JS implementations do not support getters and setters for properties yet, so observables were implemented like this to get around this limitation.