When we create an AWS Cloud9 environment, it comes with GO. However, if we want to use the GIN framework, GO version 1.13+ is required. When we choose Ubuntu Server 18.04 LTS in AWS Cloud9, the GO version is too old. Hence, we need…

When we are using VS Code for development, it also comes with powershell as the default terminal. Sometimes we have to run commands in the terminal, and the commands maybe long and easily make typo, for example: kubectl kudectl You have to spend some amount of time to figure it…

At the past, you may have heard about escape() function encodes a string to make a string portable, so it can be transmitted across any network to any computer that supports ASCII characters. However, it was deprecated in JavaScript version 1.5. Now, we should use encodeURI() or encodeURIComponent() instead. The…

When we want to use SVG image in React, we may import it like this: import {ReactComponent as Logo} from "./logo.svg"; In my project, the logo.svg is a X for user to click to delete the item in the list. I added an onClick function to it as below:

I’m a Libra. It is hard for me to make a decision especially at lunch time. Does it resonates to you? So I decided to make a lucky wheel to help me to choose a restaurant at lunch time. It will rotate base on your pressing time. This is what…

What is CSRF? Cross-site request forgery (also known as CSRF) is a web security vulnerability that allows an attacker to induce users to perform actions that they do not intend to perform. …

I found that most of the resources about react-intl are outdated and the docs of react-intl is quite ambiguous. Therefore, I will demo some components and functions of react-intl after some trial and error to help other peoples who want to build a multilingual website. We use create-react-app in this…

This is part 2 of the tutorial. Please read basic usage of useFormik hook with React Form(1) first. Let’s continue with the code in last tutorial. Now, we add a new validation for field lname, and see what will happen. When we just type in first name, the…

Serializability of a class is enabled by the class implementing the java.io.Serializable interface. Classes that do not implement this interface will not have any of their state serialized or deserialized. All subtypes of a serializable class are themselves serializable. The serialization interface has no methods or fields and serves only…