 Resources from Ben Lesh in 2021

RxJS is a library for composing asynchronous and event-based programs by using observable sequences. 


rxjs

Let's learn the basic anatomy of an RxJS Observable by creating one from scratch. In this lesson, we create a simple Observable. It covers handling asynchronicity, emitting values, observable completion and error handling.

Creating An Observable with RxJS

Capturing every event can get chatty. Batching events with a throttled buffer in RxJS lets you capture all of those events and use them responsibly without overloading a subscriber downstream.

Throttled Buffering in RxJS

Let's look at some of the basic features of RxJS Observables as asynchronous primitives, by comparing them to their cousins, Promises.

RxJS Observables vs Promises

Get a better understanding of the RxJS Observable by implementing one that's similar from the ground up.

Creating Observable From Scratch

Higher order Array functions such as filter, map and reduce are great for functional programming, but they can incur performance problems. This lesson illustrates how stream processing with RxJS can save you from these pitfalls.

Stream Processing With RxJS vs Array Higher-Order Functions

This lesson covers how to toggle an observable on and off from another observable by showing how to use a checkbox as a toggle for a stream of data.

Toggle A Stream On And Off With RxJS

What is the difference between map and flatMap? How do you take an Observable of Observables and output a single stream? This lesson is a quick look at map and flatMap and how they relate.

RxJS - map vs flatMap

RxJS Observables represent a collection of values over time, and can be accessed in familiar ways similar to arrays. RxJS can be thought of as underscore or lodash for asynchronous operations!

What Is RxJS?

What is the RxJS equivalent of Array reduce? What if I want to emit my reduced or aggregated value at each event? This brief tutorial covers Observable operators reduce() and scan(), their differences and gotchas.

Aggregating Streams With Reduce And Scan using RxJS

Get your code back on the happy path! This lesson covers a variety of ways to handle exceptions thrown by Observables in RxJS. Operators covered are: catch, onErrorResumeNext, retry and retryWhen

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Ben Lesh