filter | where

Filters the elements of an observable sequence based on a predicate. This is an alias for the where method.

Arguments

1. predicate (Function): A function to test each source element for a condition. The callback 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.

Returns

(Observable): An observable sequence that contains elements from the input sequence that satisfy the condition.

Example