1
Let's learn RxJS
1m
2
Return Multiple Values from Observables in RxJS
6m 43s
3
Push Values from Observables in RxJS
3m 21s
4
Throw Errors with RxJS Observables
1m 39s
5
Perform an Action on Completion with RxJS Observables
1m 48s
6
Deliver Synchronous Values with the RxJS of() Operator
2m 6s
7
Convert JavaScript Values to RxJS Observables
3m 41s
8
Convert DOM and Node.js Streams to RxJS Observables with fromEvent
3m 49s
9
Combine empty, never, and throw Operators with Observables in RxJS
2m 48s
10
Set Intervals with RxJS interval and timer Operators
4m 11s
11
Understand the RxJS create Operator
3m 3s
12
Return Subscriptions from the Subscribe Function in RxJs
3m 14s
13
Observables are the foundation in RxJS
54s

Convert JavaScript Values to RxJS Observables

RxJS^5.0.0

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The of() operator essentially converted a list of arguments to an Observable. Since arrays are often how we structure list of things in JavaScript, we should have a way of transforming arrays into Observables.

This lesson teaches how you can convert from Arrays to Observables, from Promises to Observables, and from Iterators to Observables. We will look at the API RxJS has for doing that: from, fromPromise, and fromArray.

Course

RxJS Beyond the Basics: Creating Observables from scratch

Steve Cordrey

~ 8 years ago

It looks like fromArray() has been deprecated.

André Staltzinstructor

~ 8 years ago

Hi Steve, that is correct. The API fromArray() is not directly available, but one can still use from() which auto-detects what kind is the argument (array, Promise, etc) and under the hood may use fromArray or fromPromise, etc.