c – I don’t know why UDP winnsock Chat Program returns -1 value from recvfrom and sendto

Currently, we are producing UDP chat programs using MFC and C. I’m working on both bind because I have to send incoming messages from the server and client An error occurs when recvfrom and sendto return -1. I don’t know what the problem is I searched it and did what I did, but it’s not … Read more

Build a Chat App With Nestjs and PostgreSQL

The code for this tutorial is available on my GitHub repository. Feel free to clone it as you follow the steps. Let’s begin! What Is NestJS? NestJS is a Node.js framework for creating fast, testable, scalable, loosely coupled server-side applications that use TypeScript. It takes advantage of powerful HTTP server frameworks such as Express or … Read more

Writing a Chat With Akka

Ah, writing chats. So simple yet so complex. Yes, writing chats — as in coding them, not chatting (though that might prove to be problematic too, but that’s a whole different problem). If you’re looking for a step-by-step tutorial on implementing the backend for a basic multichannel chat, read on. So let’s dive into the … Read more

javascript – in nodejs+express how to prevent socket.io from returning all multiple added chat messages twice? and only return the single added message once

[I am trying to make a littlechat with socket.io + node express, the problem is that when emitting the socket it returns in the browser not only the message that I have added, but all the previous ones, so that in the browser view I only have correct messages added i have to refresh the … Read more

Create a Web3 Chat Powered by Ethereum | by Thomas Guibert | May, 2022

Who would have thought that it would be this easy? Photo by Jason Leung on Unsplash In this article, you’re going to learn how to connect an Ethereum Smart Contract to a React App and enable users to interact with it. If you’re new to Ethereum or Smart Contract development, I highly recommend you to … Read more