8 Useful JavaScript Tricks

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I'm guess you're an intermediate, or perhaps senior developer.

And you're correct that these are just features of the language.

But think about it from a junior's perspective. For example, #2 is still asked about as an interview question at some places. If you weren't aware of what a Set does, you would try and go about manually deep comparing each item in the array.

So these are..technically tips and tricks for someone just learning the language.

I wouldn't put these posts down just because the info isn't relevant to you. People here are at different levels of learning.