Discussion on: Ever Realized You've Been Doing Things the Hard Way? What Simple Tricks Did You Miss?

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I'll start.

For years, whenever I needed to handle an error in an RxJS stream with a side effect, I would catch the error and then rethrow it using catchError and throwError. Instead, I could have simply used tap:

stream$.pipe(
  tap( { error: (e) => { alert(e.message); } } )
)

Rens Jaspers • Feb 20

Another RxJS one:

I often combine streams with forkJoin or combineLatest and want the output as an object with stream names as keys. Before, I did it like this:

combineLatest([firstStream$, secondStream$]).pipe(
  map(([first, second]) => ({first, second}))
)
// output: { first: 'some value', second: 'some other value' }

But, you can directly do:

combineLatest({ first: firstStream$, second: secondStream$ })