Projects each element of an observable sequence into a new form by incorporating the element's index. This is an alias for the
Function): Transform function to apply to each source element. The selector is called with the following information:
- the value of the element
- the index of the element
- the Observable object being subscribed
Any): Object to use as
thiswhen executing the predicate.
Observable): An observable sequence which results from the comonadic bind operation.