Learn JavaScript Promises (Pt 3) for sequential and parallel work in Cloud Functions - Firecasts

[lgopt]

Promise.all is no longer HELL. Thank you for taking the trouble to make stuff like this so clear. Very appreciative.

[hakunamata_tuh]

Thank you for giving such a free/great/quality video tutorial to our fellow developer :)

[stavroskefaleas]

Excuse me sir, but how do you add a field of type object in the greater-boston document at 2:20 ?
I am trying to find such a field type but I can't!
Thank you!

[jaebeombae]

O.M.G. this is a true lifesaver!!! Thanks Doug!

[chimenkwok]

The code from the video doesn't work.

[SampathLokuge]

Excellent explanation. Thank you. We really need async/await video now :D

[leduyminh]

3:45 instead of looping creating an empty array and push to it using a loop, you can use .map, which I think is more readable

[dsebastien]

Every time I see new content about Promises, I keep wondering why Observables don't get standardized faster :)

[markdeanraymundo]

how can i create the cities which is an array of city ids ???? pls help.thank you

[julianbenegas]

What an amazing video!! Thanks Firebase

[LOOTS]

One more thing I have been wondering about... At 5:33, should not that 'forEach'-loop be asynchronous? I am pretty new to this.

[nwankwochinonso]

using typescript what is the type for the array promises, am having trouble pushing DocumentSnapshot request into an array.

[LOOTS]

In the last promise, should not 'response.send(results)' be returned? Like 'return response.send(results)'?

[KosratDAhmad-tiqy]

Where can I find the source code for this tutorial??

[karolinahagegard]

So. What's this "Python pretty-printer" then, and how can I get it?! 🙂

[TheRedCamaro]

Excellent Videos!! What do you do if you have millions of promises to return from the database?

[rishipandya]

For me, the part

is creating a problem for me.
Basically the {city} is considered as a part of the whole string and hence the city variable which was declared is not used in the loop.
This creates an error and how do I fix this issue? So that $(city} is actually read as a separate value from the string?

Ps- I’ve named the collection as city weather and not cities weather so I think that cannot be an issue

[띠용-ljr]

src/index.ts:10:22 - error TS2532: Object is possibly 'undefined'.

10 const cities = areaSnapshot.data().cities


src/index.ts:19:13 - error TS7034: Variable 'results' implicitly has type 'any[]' in some locations where its type cannot be determined.

19 const results = []


src/index.ts:24:21 - error TS7005: Variable 'results' implicitly has an 'any[]' type.

24 response.send(results)


I can't find what is wrong.. somebody helps me.

[davidr]

Can this (promises) be used with the RealTime Database or only with Cloud Firestore?

[caiomar]

Can I follow the same principle if the promises are from different functions (push & remove). For example, I have to push X number of data from node Y into
node Z and then remove the original node Y.

I am trying, but like you said, I am getting weird results. Promises are promises, I should be able to I think. I'm gonna keep trying.