chatter | A chatting app using socket.io | Socket library

can any one please tell me and explain why I am getting this error "Cannot read property 'addEventListener' of null" on chrome's console I am building a chat application on NodeJS but I am getting this error can anyone help me please fix this.

client side JS code.

I'm using my arduino to publish a simple array. This is the code I'm using:

I'm try make a Convert From Base64 String. I read about base64 be ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/= This is my string:

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

I cant find a different chatter. Always are between the acceptable chatters.

I my code i do:

A third question in the saga: How to correctly implement select to correctly get data from stdin and recv(). I recommend reading this and the other question it links to understand the situation.

Basically, I tried my luck at implementing select() myself. My code:

I've made my attempt at netcat in a C++ program that uses sockets. It seems to be able to generate the socket, connect, and maybe send data fine but there seems to be an error I can't find. It doesn't properly return replies from the server. I'm able to connect to my HTTP server and scanme.nmap.org fine, but whenever I test it by sending a HEAD / HTTP/1.1 (banner grab) it doesn't show any response from the server. Sense I have made the program so that if it has an error generating a socket, connecting, sending my input, it will alert me and terminate I know that it's having no issue doing these. So I know that the program is working as it should, but there has to be either a problem with the way it sends data or with the way it handles replies. Interestingly, when connecting to my router I'm able to get a proper response which is the same 400 Bad Request I get from netcat

EDIT: I FORGOT MY CODE. ADDING THAT IN RIGHT NOW

EDIT: THERE

The reason we want this kind of messaging in a Teams channel is to get rid of some spamming in our mailboxes. Still there is a lot of traffic in this channel and without mentions it's easily lost in the chatter.

For example, a message like this is in my opinion useless if I don't notice it:

I have been using Slack with TeamCity before and had a lot of opportunities for customization.

So my question as stated in the subject is:

Is there a way to get @mentions in the messages generated by Azure Devops/Repos/Pipelines when subscribing to service hooks in Microsoft Teams?

Both of the SELECT statements return only one scalar data each. I wish to pass them as the first two parameters of the INSERT statement. But it's throwing an error stating invalid comma after the second SELECT statement. What am I doing wrong here?

I have one activity and few fragments. I set up my activity with NavController and navigation graph like this:

It seems i have 2 errors, 1st is that cannot concatenate str and bytes, 2nd is that that the connection was closed by the remote host. Wanna help.

I want that this sends a message to all the clients that this person has left the chat, instead of that it is giving the 2nd answer.

Server_chat.py