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My Activity Report For 2019

It has been another great year for technology and The Polyglot Developer. Like I’ve done in a 2018 activity report, and the years before it, I wanted to take a moment to reflect on all that was accomplished for the 2019 calendar year.

If you’re unfamiliar with this kind of post, it is more or less a numbers report for the various things that happened throughout the year. Such things include blog, podcast, and YouTube metrics, as well as information around events and speaking engagements.

Not only is this an opportunity for me to keep track of things, but you can use it as an opportunity to learn about how I’ve conducted business and apply it towards your own.

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Change the Host File of an Android Emulator

While working on a bug in one of my projects recently, I found an issue that I could only recreate on an Android device. However, due to some cross-origin resource sharing (CORS) issues on my server, I had to serve my development environment from a changed hostfile that had a specific subdomain of my project.

With the ability to use a remote Chrome debugger from your desktop to a mobile device, you can use an emulator and still have your full Chrome debugging capabilities. The only problem then, is how to get the host file to match your desktop environment. Following these steps will allow you to do just that!

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The Community Contributions of 2019

Last year, in my article titled, The Community Contributions of 2018, I highlighted 11 tutorials that were contributed by the community. To show my appreciation towards the guest contributors on The Polyglot Developer, I wanted to highlight the content that they’ve produced in 2019.

If you found any of the following tutorials valuable, I encourage you to reach out to the author on social media and thank them for taking the time to produce such great content.

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Generate Images from HTML with Gulp and Puppeteer

Have you ever needed to generate an image from your HTML? Whether it be for design purposes or for marketing purposes with social media, knowing how to get a screenshot of your HTML design without manually taking the screenshot can be a great thing.

A use-case I was interested in was around feature graphics for each of my blog posts. Sure I could open a graphic design tool like Affinity Photo, or use the same feature graphic for every tutorial, but what if I wanted to automatically generate them based on certain criteria?

In this tutorial we’re going to see how to use Puppeteer to take screenshots of our HTML through a headless Gulp task.

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Maps and Location Services with HERE by Example, Released

I’m pleased to announce that a new course has been published, this time on the subject of maps and various location services. This course titled, Maps and Location Services with HERE by Example, focuses on building web applications using JavaScript and products by HERE Technologies.

In this course you’ll see many step by step examples on how to work with interactive maps, geocode and reverse geocode locations, calculate different types of routes, and more.

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Checking for Unchecked Errors within Golang Applications

When it comes to error handling in the Go programming language (Golang), they can either be incredible or a miserable nightmare in terms of management. You can choose to embrace them and check if they are nil every opportunity that you have, or you can ignore them with an underscore. However, what happens in those circumstances where you didn’t even know the function returned something?

Regardless of the story, checking for errors is a good thing, even if you hate doing it. In this tutorial we’re going to see how to scan your code for missed opportunities when it comes to error checking using a nifty open source tool.

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Creating an eBook with Pandoc and Markdown

You might already be aware of this, but I’ve accomplished a life achievement of writing and self-publishing two technical eBooks. I published Web Services for the JavaScript Developer, followed by Web Services for the Go Developer, which contain the same concepts using two different programming technologies.

If you’ve ever thought about writing an eBook, you’ve probably opened tools like Apple Pages or Microsoft Word and said to yourself, formatting this is going to be a nightmare. Technical content will, more often than not, contain code, which may have sophisticated formatting. Writing a programming eBook or another technical eBook doesn’t have to be a hassle when you’re using the right tooling.

In this tutorial, we’re going to explore Pandoc, and see how you can write a book quickly and easily with Markdown.

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