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Why Metrics Must Guide Your DevOps Initiative

Discover faster, more efficient performance monitoring with an enterprise APM product learning from your apps. Take the AppDynamics APM Guided Tour! Read more to learn why a metrics-oriented framework is a critical piece of a DevOps philosophy. Metrics-oriented thinking is key to continuous improvement – and a core tenant of any agile or DevOps philosophy. Metrics are factual and once ...

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FREE Programming books with the WCG Newsletter

Here at Web Code Geeks we know how much you love books about programming; we are geeks ourselves. After all, a programmer that respects himself should always have his face in a book, he has to keep up with the latest technologies and developments. For this reason, we have decided to distribute 9 of our books for free. You can ...

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Python 3: TypeError: unsupported format string passed to numpy.ndarray.__format__

This post explains how to work around a change in how Python string formatting works for numpy arrays between Python 2 and Python 3. I’ve been going through Kevin Markham‘s scikit-learn Jupyter notebooks and ran into a problem on the Cross Validation one, which was throwing this error when attempting to print the KFold example: Iteration Training set observations Testing ...

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Essential (and free) security tools for Docker

Docker makes it easy for developers to package up and push out application changes, and spin up run-time environments on their own. Maybe too easy. With Docker, developers can make their own decisions on how to configure and package applications. But this also means that they can make simple but dangerous mistakes that will leave the system unsafe without anyone ...

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HTML5 Webcam Tutorial

1. Introduction In this article, we will look at how to capture images as well as video from user’s webcam. There have been several iterations to enable access to devices from JavaScript. Starting from special attributes for existing input tags to getUserMedia part of the WebRTC APIs. We will look at how to use these and leverage them for accessing ...

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Progressive Web Applications: A New Dawn or a Major Failure of Mobile Development?

Businesses are constantly looking for new ways to communicate with clients. Business owners spend lots of time, effort, and money on adapting their own websites for mobile devices. With the intensive growth of mobile device usage, having a mobile-friendly business website is crucial. A recent study conducted by Statista shows that the mobile phone internet user penetration will be 63.4 ...

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Dockerizing Node.js Applications

Containers are one of the best ways to deploy Node.js applications these days. In this post, you will learn how you can containerize your Node.js applications using Docker. First, we will create a simple web application in Node.js, then we’ll build the Docker image and run it. You’ll also learn a few tips and tricks to make development easier and ...

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Angular 5.0 New things

Angular team has released Angular 5.0 on 1st Nov 2017. They focused on most new features and bug fixes. This release continues our focus on making Angular smaller, faster, and easier to use. Following things are New: Angular CLI 1.5 and Angular 5.0.0 Now we are in CLI 1.5, if you install CLI 5.0, automatically you will get the angular ...

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Angular 4: Service example

Welcome to Angular 4 services Angular services are for building out code that can be shared across multiple components. And these are singletons. services restrict the instantiation of a class to one object. It means the methods and properties can be shared throughout your application from a single shared instance. These services are best way to store the session data ...

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WTF code, defects, and the principle of least astonishment

We have recently introduced two defects, while trying to improve old, obscure code. Of course we are to blame for not being more paranoid and not researching more why the code was there. But if the code was clear to start with, if it followed the least astonishment principle, the errors wouldn’t have happened. In both cases the original code provoked ...

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