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Node News Monday, March 19 Images, Daryl, Latest tech stories & more…

Node News TLDR / Table of Contents

  • Node.js + OpenCV for Face Recognition – Vincent Mühler –
    • Recently I have added the face recognition algorithms from OpenCV contrib to opencv4nodejs, an npm package, which allows you to use OpenCV in your Node.js application. Today we are going to take a…
    • images, daryl, confidence, evil boy Negan, following face images
  • How to write Selenium tests in Node.js with WebDriverIO
    • Selenium is a set of tools frequently used for testing applications: it fires up a page in the web browser and examines its contents paying special attention to errors. It can also bring on an…
    • latest tech stories, special attention, Hacker Noon, testing applications, AMI family
  • Node.js Best Practices | Codementor
    • Let’s save the world of Node.js projects together! Here are the top 14 Node.js best practices that Node developers of every level should know.
    • code, app, best practices, solid production application, best Node.js practices
  • Prepare the imagedataBefore we can train the recognizers we have to collect some image data with faces.
  • As I simply picked some images from the web, we have to extract a subimage centered at the face of the character shown in each image.
  • We will read the images and split them into a set of training and test samples as follows: – This will give us the following face images: – Resizing the images is necessary, as the recognizers expect the data to be equally sized images.
  • We can now run the prediction of our test images: – Running the example should give us the following output: – eigen: – predicted daryl to be: daryl, confidence: 1245.68 – predicted negan to be: negan, confidence: 2247.25 – predicted rick to be: negan, confidence: 2502.47fisher: – predicted daryl to…
  • There is also a second face recognition example in the repo, which produces the result shown in the title image, just in case your interested.

Tags: images, daryl, confidence, evil boy Negan, following face images

  • How to write Selenium tests in Node.js with WebDriverIOObjectives of thisguideSelenium is a set of tools frequently used for testing applications: it fires up a page in the web browser and examines its contents paying special attention to errors.
  • It can also bring on an interaction with the page checking the contents later.
  • After reading this guide youll be able to: – Write Selenium tests in Node.jsRun test locally on the Selenium ServerAutomate your testing processes using Buddy CI/CDWriting the first SeleniumtaskLets set a task that will fire up Buddy website in Chrome browser and take a screenshot.
  • At the beginning, though, you should install Node.js…

Tags: latest tech stories, special attention, Hacker Noon, testing applications, AMI family

  • It sure is easy to get started on those Node.js projects, but once you get beyond the basic app, knowing how to best structure your code and how to deal with errors can sometimes become a nightmare (as with most languages and frameworks).
  • While updating modules is always a good practice, having a team of developers all running against slightly different versions of dependencies can lead to differences in behaviour or availability of APIs.
  • If you need to load further configurations, you can use a module like popular option to load environment variables is (Thanks to @szabi) – – I know weve all had those moments where we open a new file from another project for the first time or the file came from…
  • I don’t need to duplicate other great work that’s already available, so heres a few links to get you started: – – Having an error bring down your entire app in production is never a great experience.
  • Though other options include (Nodemon)[http://nodemon.io/] (thanks @szabi) and install it as a global module: – – Then to launch your process, you should run: – – To handle restarting after the server crashes, you can follow the PM2 guide for you platform: – – By default Node.js is run in…

Tags: code, app, best practices, solid production application, best Node.js practices

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