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How to get the real type of any JavaScript variable

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This weekend I published a short article talking about how to create a CSV using template strings in Node.js. I posted the link on Reddit and a couple of more places and the general feedback was something along the lines of "great article but the most interesting part is that type checking thing".

I decided to record a short screencast, this morning, to detail how that code works and what you could use that function for. The outcome is already on YouTube and it can be viewed here.

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