[RxJS: Observable vs Promise] Observable vs. Promise Cheat Sheet #rxjs #observable #promise #angular

rxjs-observable-vs-promise.md

https://v12.angular.io/guide/comparing-observables#cheat-sheet

OPERATION	OBSERVABLE	PROMISE
Creation	new Observable((observer) => { observer.next(123); });	new Promise((resolve, reject) => { resolve(123); });
Transform	obs.pipe(map((value) => value * 2));	promise.then((value) => value * 2);
Subscribe	sub = obs.subscribe((value) => { console.log(value) });	promise.then((value) => { console.log(value); });
Unsubscribe	sub.unsubscribe();	Implied by promise resolution.