
## Table of Contents

- [Subject](advanced-rxjs/subject/index)
  - [Recap `Observer`](advanced-rxjs/subject/recap-observer)
  - [Observables are Unicast](advanced-rxjs/subject/unicast)
  - [Exercise - Unicast](advanced-rxjs/subject/exercise-unicast)
  - [Solution - Unicast](advanced-rxjs/subject/solution-unicast)
  - [Subjects are Multicast](advanced-rxjs/subject/multicast)
  - [Exercise - Multicast](advanced-rxjs/subject/exercise-multicast)
  - [Solution - Multicast](advanced-rxjs/subject/solution-multicast)
- [Multicasting Operators](advanced-rxjs/multicasting-operators/index)
  - [`connectable()`](advanced-rxjs/multicasting-operators/connectable)
  - [Exercise - `connectable()`](advanced-rxjs/multicasting-operators/exercise-connectable)
  - [Solution - `connectable()`](advanced-rxjs/multicasting-operators/solution-connectable)
  - [`connect()` Operator](advanced-rxjs/multicasting-operators/connect-operator)
  - [Exercise - `connect()` Operator](advanced-rxjs/multicasting-operators/exercise-connect-operator)
  - [Solution - `connect()` Operator](advanced-rxjs/multicasting-operators/solution-connect-operator)
  - [`share()` Operator](advanced-rxjs/multicasting-operators/share-operator)
  - [Exercise - `share()` Operator](advanced-rxjs/multicasting-operators/exercise-share-operator)
  - [Solution - `share()` Operator](advanced-rxjs/multicasting-operators/solution-share-operator)
- [Subject Variants](advanced-rxjs/subject-variants/index)
  - [`AsyncSubject`](advanced-rxjs/subject-variants/async-subject)
  - [Exercise - `AsyncSubject`](advanced-rxjs/subject-variants/exercise-async-subject)
  - [Solution - `AsyncSubject`](advanced-rxjs/subject-variants/solution-async-subject)
  - [`BehaviorSubject`](advanced-rxjs/subject-variants/behavior-subject)
  - [Exercise - `BehaviorSubject`](advanced-rxjs/subject-variants/exercise-behavior-subject)
  - [Solution - `BehaviorSubject`](advanced-rxjs/subject-variants/solution-behavior-subject)
  - [`ReplaySubject`](advanced-rxjs/subject-variants/replay-subject)
  - [Exercise - `ReplaySubject`](advanced-rxjs/subject-variants/exercise-replay-subject)
  - [Solution - `ReplaySubject`](advanced-rxjs/subject-variants/solution-replay-subject)
  - [`WebSocketSubject`](advanced-rxjs/subject-variants/websocket-subject)
  - [Exercise - `WebSocketSubject`](advanced-rxjs/subject-variants/exercise-websocket-subject)
  - [Solution - `WebSocketSubject`](advanced-rxjs/subject-variants/solution-websocket-subject)
- [Error Handling](advanced-rxjs/error-handling/index)
  - [Error Notification](advanced-rxjs/error-handling/error-notifications)
  - [Error Notification](advanced-rxjs/error-handling/error-notifications)
  - [`throwError()` Operator](advanced-rxjs/error-handling/throw-error-operator)
  - [Exercise - `throwError()` Operator](advanced-rxjs/error-handling/exercise-throw-error-operator)
  - [Solution - `throwError()` Operator](advanced-rxjs/error-handling/solution-throw-error-operator)
  - [`catchError()` Operator](advanced-rxjs/error-handling/catch-error-operator)
  - [Exercise - `catchError()` Operator](advanced-rxjs/error-handling/exercise-catch-error-operator)
  - [Solution - `catchError()` Operator](advanced-rxjs/error-handling/solution-catch-error-operator)
  - [`finalize()` Operator](advanced-rxjs/error-handling/finalize-operator)
  - [Exercise - `finalize()` Operator](advanced-rxjs/error-handling/exercise-finalize-operator)
  - [Solution - `finalize()` Operator](advanced-rxjs/error-handling/solution-finalize-operator)
  - [`retry()` Operator](advanced-rxjs/error-handling/retry-operator)
  - [Exercise - `retry()` Operator](advanced-rxjs/error-handling/exercise-retry-operator)
  - [Solution - `retry()` Operator](advanced-rxjs/error-handling/solution-retry-operator)
  - [`retryWhen()` Operator](advanced-rxjs/error-handling/retry-when-operator)
  - [Exercise - `retryWhen()` Operator](advanced-rxjs/error-handling/exercise-retry-when-operator)
  - [Solution - `retryWhen()` Operator](advanced-rxjs/error-handling/solution-retry-when-operator)
  - [`throwIfEmpty()` Operator](advanced-rxjs/error-handling/throw-if-empty-operator)
- [Custom Operators](advanced-rxjs/custom-operators/index)
  - [Higher Order Observables](advanced-rxjs/custom-operators/pipe-function)
  - [Exercise - Pipe Function](advanced-rxjs/custom-operators/exercise-pipe-function)
  - [Solution - Pipe Function](advanced-rxjs/custom-operators/solution-pipe-function)
  - [Higher-order Function Operator](advanced-rxjs/custom-operators/higher-order-function-operator)
  - [Exercise - Higher-order Function Operator](advanced-rxjs/custom-operators/exercise-higher-order-function-operator)
  - [Solution - Higher-order Function Operator](advanced-rxjs/custom-operators/solution-higher-order-function-operator)
- [Testing](advanced-rxjs/testing/index)
  - [`TestScheduler`](advanced-rxjs/testing/test-scheduler)
  - [Marble Syntax](advanced-rxjs/testing/marble-syntax)
  - [Getting Started with Marble Tests](advanced-rxjs/testing/getting-started-with-marble-tests)
  - [Exercise - First Test](advanced-rxjs/testing/exercise-first-test)
  - [Solution - First Test](advanced-rxjs/testing/solution-first-test)
  - [Exercise - Subscription](advanced-rxjs/testing/exercise-subscription)
  - [Solution - Subscription](advanced-rxjs/testing/solution-subscription)
  - [Exercise - Error](advanced-rxjs/testing/exercise-error)
  - [Solution - Error](advanced-rxjs/testing/solution-error)
  - [Flush](advanced-rxjs/testing/flush)
  - [Exercise - Test Custom Operator](advanced-rxjs/testing/exercise-test-custom-operator)
  - [Solution - Test Custom Operator](advanced-rxjs/testing/solution-test-custom-operator)


Custom Logger Operator