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

Computes the average of an observable sequence of values that are in the sequence or obtained by invoking a transform function on each element of the input sequence if present.

参数

1. [selector] (Function): A transform function to apply to each element.
2. [thisArg] (Any): Object to use as this when executing selector.

返回值

(Observable): An observable sequence containing a single element with the average of the sequence of values.

例

Without a selector

With a selector