RxJS von Grund auf - Teil 2 Operatoren und Operatorenketten Yannick Baron @yannick_baron https://www.thinktecture.com/yannick-baron 

working with RxJS Recap: Practical Introduction 

• Observable
 data stream or source emitting data over time • Observer
 function that will be called when new data is emitted • Subscription
 one-sided connection between Observer and Observable • Operators (combination, filtering, transformation, ...)
 replace your observables with a modified one Observable, Observer, Subscription & Operators 

• Observable
 data stream or source emitting data over time • Observer
 function that will be called when new data is emitted • Subscription
 one-sided connection between Observer and Observable • Operators (combination, filtering, transformation, ...)
 replace your observables with a modified one Observable, Observer, Subscription & Operators 

• three events we can react to • next
 receive the next value going through the stream • error
 react to the observable throwing - no more values will be emitted
 observers unsubscribe - observable does not complete • complete
 observable completes without error - no more values will be emitted
 observers unsubscribe
 next, error, complete [Examples: 02, 03] 

new Observable(observer => {
 observer.next('Value 1');
 observer.next('Value 2');
 observer.complete();
 
 return () => {
 // observer unsubscribed
 };
 });
 
 from(['Value 1', 'Value 2']);
 
 of('Value 1');
 
 create, fromEvent, interval, ...
 creating Observables is easy!
 wrap asynchronous actions several (12) creation operators [Examples: 01] 

It's a wrap! https://www.thinktecture.com/yannick-baron