When Observable is declared with a type (especially an array) it sets up some wrapped methods to simplify working with it. The wrappers also set up automatic d

When Observable is declared with a type (especially an array) it sets up some wrapped methods to simplify working with it. The wrappers also set up automatic dependency resolution so you can do cool things like: list = Observable [] reversed = Observable -> list.map reverse list.push 'blah' reversed() # => ['halb'] There's no polling, the observable notifies all observers immediately when the value changes.