1
Understand RxJS Operators
5m 38s
2
Use Marble Diagrams to Understand RxJS Operators
4m 29s
3
Use RxJS mapTo and map to Transform Values Emitted by Observables
3m 34s
4
Inspect the Behavior of Operators with RxJS do
4m 25s
5
Filter Events Based on a Predicate with RxJS filter
2m 6s
6
Filter Events with RxJS Operators take, first, and skip
2m 51s
7
Filter Events with RxJS Operators takeLast and last
3m 10s
8
Prepend/Append Data with RxJS Operators concat and startWith
6m 22s
9
Merge Values in Parallel with RxJS Operator merge
3m 57s
10
Join Values from Multiple Observables with RxJS combineLatest
4m 21s
11
Control the Output of Values with RxJS Operator withLatestFrom
4m 2s
12
Combine Values with RxJS Operator zip
5m 10s
13
Combine Values of One Observable with RxJS scan
5m 21s
14
Group Consecutive Values Together with RxJS Operator buffer
5m 17s
15
Delay the Emission of Values from an RxJS Observable
4m 22s
16
Drop and Delay Observable Emissions with RxJS debounce
5m 21s
17
Limit the Rate of Emissions from Observables with throttle in RxJS
2m 48s
18
Filter Redundant Observable Emissions with RxJS distinct
4m 34s
19
Handle Errors with RxJS catch
5m 24s
20
Resubscribe to an Observable on Error with RxJS retry
4m 1s
21
Repeat the Execution of an Observable with RxJS repeat
1m 28s
22
More operators and conclusion
1m 6s

Filter Events Based on a Predicate with RxJS filter

RxJS^6.3.3

Share this video with your friends

through a predicate function that tells what is the criteria to pass or reject an event. This lesson introduces filter: an operator that allows us to let only certain events pass, while ignoring others.

🚨 Since we are importing interval from RxJS, we don't need to preface our Observables with Rx.Observable. You can no longer .{operator}, you need to .pipe({operator}) instead.

Course

RxJS Beyond the Basics: Operators in Depth

Erkan Buelbuel

~ 8 years ago

Why don't you use iterable JSON structures in your demos? Nobody would use "Observables" for primitive arrays.

André Staltzinstructor

~ 8 years ago

Hi EBIA,

Which arrays are you referring to in this lesson?

Daniel Laubacher

~ 5 years ago

I would like to note that this isn't Rx 6 friendly. You'll need to use these concepts with slightly different imports and usage.