Articles
Mongoose bulkWrite upsert
Here is a code snippet for a bulk update with upsert using Mongoose:
Controlling a motor using an H bridge
A DC motor model can be as simple as: T = K * I where T is the torque provided by the motor, K the motor constant and I the current that flows through it. From this simple model, one can see that if the sign of the current changes, that of the torque also changes. Thus, changing the direction of rotation of a DC motor is a simple as reverting flow into it.
Sending pictures via http with an ESP32-CAM
Pictures taken with the ESP32-CAM can be sent in a multipart/form-data type content via HTTP. Here is a sample code to achieve this:
GitLab CI
GitLab CI is a feature of GitLab that allows users to have actions triggered upon pushing a repository to it's remote. For example, it can be used to execute all tests defined in the code, containerize the application and deploy it. A popular alternative to GitLab CI is Jenkins.
Publish a module to NPM
This article is based on <a href="https://www.freecodecamp.org/news/how-to-make-a-beautiful-tiny-npm-package-and-publish-it-2881d4307f78/" rel="noopener noreferrer nofollow">this publiation</a>.
Javascript self-executing functions
In Javascript, a function can be defined as so:
Callbacks in Javascript
Here is a simple javascript function that is designed to print its argument in the console:
Apache reverse proxy for web app
Let's imagine that we've just finished developping a NodeJS application that listens for HTTP requests on port 8086 and that we have an Apache2 instance listening on port 80.
Git store credentials
Having to enter one's credentials for every push to a remote can be annoying. Here is to have git save those credentials for future uses.
Minikube using insecure registry
By default, Minikube will not allow the usage of insecure docker registries. To change this setting, Minikube can be started as so: