WebSocket là gì ? Websocket là một công nghệ giao tiếp hai chiều (full-duplex) trên giao thức HTTP , cho phép việc gửi và nhận dữ liệu giữa client và server để tạo một kết nối theo thời gian thực . Giao thức này không sử dụng HTTP mà thực hiện nó qua TCP. Mặc dù…
1. Redux là gì? Redux là một thư viện quản lý State (trạng thái) toàn cục mã nguồn mở và chạy ở phía client. Trước đây khi chưa có redux thì chúng ta thường phải truyền dữ liệu từ các component cha đến các component con. Khi dự án của bạn ngày càng lớn, việc…
Redux is too complicated right ? so, let’s try a new react global state management called Jotai. Find out how it work, how to use it ? And in the last section of the blog, I’ll show you guys the usecase for redux and jotai 1. What’s Jotai ? Jotai is a lightweight state management…
Install certbot in server Run Certbot to generate Let’s Encrypt certificate Get cert.pem, chain.pem, fullchain.pem, privekey.pem Go to EMQX Dashboard then go to listener (http://example.com:18083/#/listener)
React Query is a JavaScript library that simplifies state management and data fetching in React applications. It provides an intuitive API for handling asynchronous operations, caching data, and optimizing network requests. With React Query, you can streamline your development process and create efficient React applications. 1. How do we fetch data without react query 2….
PART 1. SELF HOST SUPABASE 1. What’s supabase Supabase is an open-source alternative to Firebase. It provides a suite of tools for building scalable and secure web and mobile applications, including authentication, real-time database, and storage. Supabase is built on top of open-source technologies, and it aims to provide an easy-to-use platform for developers that…
For a remote database setup since MySQL must be able to listen for an external IP address where the server can be reached. To enable this, open up your mysqld.cnf file: sudo vim /etc/mysql/mysql.conf.d/mysqld.cnf It will look like this: . . . lc-messages-dir = /usr/share/mysql skip-external-locking # # Instead of skip-networking the default is now to listen only on…
Introduction React is a JavaScript library for building user interfaces. It allows developers to create reusable UI components and manages the state of those components efficiently. Redux, on the other hand, is a state management library for JavaScript applications, which can be used with any UI framework or library. It provides a predictable state…
Introduction Screen or GNU Screen is a terminal multiplexer. In other words, it means that you can start a screen session and then open any number of windows (virtual terminals) inside that session. Processes running in Screen will continue to run when their window is not visible even if you get disconnected. Install Linux Screen…
Tesseract OCR library is the best way to detect text on image. Let’s start with Java spring boot project. – Step 1: Download template spring boot project on: https://github.com/habogay/spring-boot-gcp – Step 2: Install tesseract otc: sudo apt-get install tesseract-ocr – Step 3: create environment in tool (I use eclipse): TESSDATA_PREFIX=/usr/share/tesseract-ocr/tessdata/ – Step 4: Use Tesseract: String…
