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WebExtensions 101

If you know the basic web technology stack (HTML, JS, and CSS), then you can indeed build a WebExtension. It wasn’t always this simple. In the past, one might have needed to know C or Objective-C and the internal workings of the browser’s own code or even the operating system’s idiosyncrasies. Thankfully, there’s been some recent consolidation efforts and some ...

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AWS Lambda: Encrypted environment variables

Continuing on from my post showing how to create a ‘Hello World’ AWS lambda function I wanted to pass encrypted environment variables to my function. The following function takes in both an encrypted and unencrypted variable and prints them out. Don’t print out encrypted variables in a real function, this is just so we can see the example working! import ...

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Designing User Interfaces With React

There are a lot of JavaScript frameworks to choose from in the modern development landscape. One of the most unique and popular of these frameworks is React . React is widely known mainly because of its backing by Facebook. As a result, it has a pretty big footprint on the web. Developers know it, trust it, and love its feature ...

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HTML5 Progress Bar Example

There are several possibilities for which we may use a progress bar in a web page. The most typical ones are for showing the download or upload state of a file. HTML5 introduced a native element for this, the tag progress. So, we don’t need any jQuery plugin or custom-complicated HTML in combination with CSS for showing a progress bar; the ...

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Using Docker Behind a Proxy

In today’s article, I am going to explore a common pain point for anyone running Docker in a large corporate environment. Today I’ll show how to use Docker without direct internet access. By default, Docker assumes that the system running Docker and executing Docker commands has general access to the internet. Often in large corporate networks this is simply not ...

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Luigi: Defining dynamic requirements (on output files)

In my last blog post I showed how to convert a JSON document containing meetup groups into a CSV file using Luigi, the Python library for building data pipelines. As well as creating that CSV file I wanted to go back to the meetup.com API and download all the members of those groups. This was a rough flow of what ...

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Docker Node.js Example

Despite the controversy and different opinions that Node.js generates among web developers, after all, it’s a technology that it’s widely used, so, sooner or later, a web developer (and sysadmin) will have to face it, meaning this that everyone should have, at least, a basic knowledge about it. This example will show how to easily set up a Node environment, within ...

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