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Please help me, i'm new to Firebase and i have a message error when i'm trying to create a collection from an existing collection ID.

The conversation is created and the ChatRoom also but i have the message appearing and disappearing after around 10 secondes, it seems as the second function doesn't wait the first one

Here's the structure :

• Create a document in "Conversations" collection.
• Getting the ID of that document.
• Create a document in "ChatRoom" collection that has the same ID as the document in "Conversations".

Here's the message error :

The following assertion was thrown building chatPage(dirty, state: _chatPageState#e5c15): a document path must be a non-empty string 'package:cloud_firestore/src/collection_reference.dart': Failed assertion: line 59 pos 14: 'path.isNotEmpty'

Here's my code :

I have an error with the code below ( Error: Too many re-renders. React limits the number of renders to prevent an infinite loop.)

The goal is to add a span on each item excepted the last one.

What is the best way to do that?

I wrote a script to extract sentences in huge set which contains particular pattern. The problem lied in the fact that , for some patterns I checked the value of the attribute at the beginning or ending of the pattern to see if the word is present in a particular list. I have 4 dictionaries with 2 lists of positive and negative word. So far I wrote the script and I am able to use the function I wrote with one dictionary. I am thinking how can I improve the my function so that I can use it at the same time of the 4 dictionaries without duplicating the bloc which loop in the dictionary.

I give an example with two dictionaries (since the script is quite long I make a small example with all the necessary element

i am using chart.js to display data. I would like to display several points per label.

A picture is better than sentences, here is an example of a poker platform :

We see that between the labels several points are recorded.

Here is my code with chart.js currently with test data :

In Leaflet, I have too many marker points and I want to regroup them, I've tried the Leaflet.markercluster in Github but I don't understand.

Here a part of my code, above I have php code where I collect some data :

I have a tsv file with two columns seperate by tabulation. The first column is the colum of sentences and the second the column of label I want to count the number of sentences which are positive, negative or neutral in the file sa I read it and loop inside it. I come up with this small code but It does not work ? How can I improve it ?

I would like to send the id book and the returnDate to the back via Axios. However, it's ok for the id but for the returnDate, the value stays "undefined". What can I add/change in my code in order to change the returnDate with the date entered in the input at the end of the code? and so use it in the handleSubmit function. Thank you.

I want to use a card inside a carousel. However, I don't understand how I can center the card element inside the carousel.

Here is what I have so far:

hello the subject is already treated but I still do not find the true answer.

i'm new to react and I want to render a list of "name". I have used map function to loop through the object, but I I only have the first "name" (Library 1) and not others. Provide me the complete for-loop syntax to render the object. thanks