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Union, intersection, difference, and more are coming to JavaScript Sets (www.sonarsource.com)

submitted 9 months ago by testeronious@lemmy.world to c/programming@programming.dev

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[–] NightAuthor@lemmy.world 27 points 9 months ago (2 children)

They didn’t have that?!

[–] bob_lemon@feddit.de 13 points 9 months ago

The more you learn about JavaScript, the less you understand how the modern web actually functions.

[–] epyon22@programming.dev 3 points 9 months ago

Set functionality was there leveraging object properties this just makes things more concise

[–] linuxPIPEpower@discuss.tchncs.de 18 points 9 months ago

Union organizing and intersectionality can only improve things.

[–] SilverShark@programming.dev 2 points 9 months ago

This seems like a nice feature. Python has sets like this too, and it's super useful.

[+] vexikron@lemmy.zip -14 points 9 months ago (1 children)

Ah yes, javascript, the database language.

Jesus fucking christ I am so glad I don't work in the corporate tech sector anymore.

[–] kogasa@programming.dev 14 points 9 months ago (1 children)

Sets aren't just for databases

[+] vexikron@lemmy.zip -13 points 9 months ago* (last edited 9 months ago) (3 children)

If you need to be able to do unions and you are doing it in javascript, you are being absurdly inefficient compared to setting up a postgres db, but i wont be able to convince you of this because of basically nonsense brainwashing from your corporate conditioning.

EDIT: Note to self, do not use lemmy while hangry.

Yep Im wayyyy off base here.

[–] kogasa@programming.dev 9 points 9 months ago

Why would you need to set up a postgres db...? Unions are a fundamental set theoretic operation that are applicable to all set-like collections. You may as well say "an in memory hash map / list is absurdly inefficient compared to a relational db." Is it efficient, to you, to spin up a postgres instance to hold a dozen key value pairs?

[–] Feathercrown@lemmy.world 6 points 9 months ago

[–] median_user@lemmy.one 5 points 9 months ago

Sets are super useful for all sorts of stuff where you want the datatype to guarantee there is only one instance of a value in the collection. UI components where you are incrementally adding things to a selection is a great example.

It's a completely standard feature in many stdlibs and has nothing to with turning JS into a database.