Agree with this due to the ability to create array literals. Arrays created by JSON.parse() also wouldn't get the new functionality.

Should the function name be diffArray() to express that specifically works with arrays?

Thank you for the feedback @ryanmcdermott! I will update the pull request.

In this updated PR, I have added a new section using the Bad/Good format.

@DavidVujic Sorry, the original code was changed in #124.

Great @vsemozhetbyt! I saw the changes, very nice improvement.

Thank you) I mean, maybe it would be good for consistency to update these fragments in your examples as well.

Done!

Now hoping for a merge and/or more feedback for improvement.

I think this is a really great idea for an addition! The only issue I have is that SuperArray holds state in that the primary state is the array data itself. Is there another simple example we can use? I don't want to contradict with the other use of SuperArray. I've had some consistency problems in this project that are almost fully resolved 😄

Thank you for the feedback @ryanmcdermott! I have given it some thought and think the "good" part of the SuperArray example should be a stateless function, because of some drawbacks that I think are major:

• complex syntax: const arr = new SuperArray(); instead of the much cleaner shorthand way: const arr = [];
• diff is a feature that shouldn't require any state.
• only instances of SuperArray (or extensions of that class) can use the Array diff function.

Let me know what you think! If you don't like it, please tell me and I will close the pull request.

(I have updated the pull request. It is updated with a function as "good" instead of the class.)

Hey David! Thanks for spending time revising this. I want to combine this PR with another: #139

The motivation is that I think we should say something about the nature of classes in the preamble of the Classes section. We can incorporate your thoughts into that introduction. I want to leave this example the way it is for now! If you have time would love to see your work as an intro in the Classes section!