In PostgreSQL, it is not uncommon to encounter an error message stating “relation does not exist” when attempting to execute a query on a table. This article aims to provide a quick explanation of why this error occurs and how to resolve it. Let’s say you have a PostgreSQL database with a table named “Car.” When you run the following query: SELECT * FROM Car; You may encounter the following error message:...
When writing JavaScript, some developers prefer not to use semicolons for a cleaner code. However, there are situations where we need to be careful, especially when using the require() function in Node.js to load external modules and files. In certain cases, you may encounter an error like this: TypeError: require(...) is not a function This error can be a bit confusing. Let’s go over how this error can occur. For example, let’s say you require a library and then need to execute some code at the root level using an immediately-invoked async function:...
If you’ve made changes to a Docker image on Docker Hub and need to update a deployed container with the latest version, follow these steps: Stop the running container: docker stop <ID or name> Remove the container: docker rm <ID or name> Pull the updated image from Docker Hub: docker pull <image name> Start a new container using the updated image and the same options used during the initial deployment: docker run <image name> ....
In the world of Git, it’s common to work on different branches simultaneously. However, at times, you might find that one branch is not up to date with the changes made on another branch. In such cases, it becomes necessary to merge the changes. This article will walk you through the process of updating a Git branch from another branch. Step 1: Check out the Branch You Want to Update The first step is to switch to the branch that you want to update....
In this blog post, I will guide you on how to update all npm packages in multiple projects that are located within subfolders. Updating packages is an essential task to ensure your projects utilize the latest features, bug fixes, and security patches. To simplify this process, we will make use of a shell script. Create a new shell script file: Open a text editor and create a new file. Save it with a ....
Updating a state variable that is defined as an object with properties can be a bit confusing when using the useState hook. Simply updating the object itself will not trigger a rerender of the component. However, there is a pattern that can be used to efficiently update the object state variable. The pattern involves creating a temporary object with one property, and then using object destructuring to create a new object that combines the existing object with the temporary object....
Updating data stored in a SQL database table is a common task when working with relational databases. To accomplish this, you can use the UPDATE command to modify specific rows of your table. However, it is crucial to include a WHERE clause to ensure that only the intended rows are updated. Let’s take a closer look at the syntax and usage of the UPDATE command: UPDATE table_name SET column_name1 = new_value1, column_name2 = new_value2, ....
Updating the dependencies of your Node project to their latest versions can improve your application’s security, performance, and compatibility. This can be done easily using npm. In this article, we will explore how to update all the npm dependencies specified in the package.json file to their latest available versions. When you install a package using npm install <packagename>, the latest version of the package is downloaded and added to the node_modules folder....
Find out how to properly upgrade the Node.js version you have installed. Node.js can be installed in multiple ways on a system, and the upgrade instructions depend on how you first installed it. Upgrading Node.js If You Installed it Using the Official Package The easiest way to install Node is to download the official package from the Node.js website. The official package contains an installer that will detect the existing version of Node....
If you’ve set up your Raspberry Pi as a network-wide adblocker using Pi-hole, you’re already enjoying an ad-free browsing experience. However, it’s essential to keep your Pi-hole software up-to-date with the latest releases and updates. Here’s a step-by-step guide on how to update Pi-hole. Check for Updates When you access the Pi-hole admin interface, you’ll notice a notification at the bottom of the page indicating if there are any updates available....