Rx.Observable.prototype.map(selector, [thisArg])


Projects each element of an observable sequence into a new form by incorporating the element's index. This is an alias for the select method.


  1. selector (Function): Transform function to apply to each source element. The selector is called with the following information:
    1. the value of the element
    2. the index of the element
    3. the Observable object being subscribed
  2. [thisArg] (Any): Object to use as this when executing the predicate.


(Observable): An observable sequence which results from the comonadic bind operation.