What is the difference between Promises and Observables?

Question

What is the difference between Promise and Observable in Angular?

An example on each would be helpful in understanding both the cases. In w

Answer 1

I believe all the other answers should clear your doubts. Nevertheless, I just wanted to add that observables are based on functional programming, and I find very useful the functions that come with it like map, flatmap, reduce, zip. The consistency the web achieves especially when it depends on API requests is a brutal improvement.

I strongly recommend this documentation, since it's the official documentation of reactiveX and I find it to be the most clear out there.

If you want to get into observables, I would suggest this 3-part post: http://blog.danlew.net/2014/09/15/grokking-rxjava-part-1/

Although it's meant for RxJava, the concepts are the same, and it's really well explained. In reactiveX documentation, you have the equivalences for each function. You must look for RxJS.