Programming Languages

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This is the current Lemmy equivalent of https://www.reddit.com/r/ProgrammingLanguages/.

The content and rules are the same here as they are over there. Taken directly from the /r/ProgrammingLanguages overview:

This community is dedicated to the theory, design and implementation of programming languages.

Be nice to each other. Flame wars and rants are not welcomed. Please also put some effort into your post.

This isn't the right place to ask questions such as "What language should I use for X", "what language should I learn", and "what's your favorite language". Such questions should be posted in /c/learn_programming or /c/programming.

This is the right place for posts like the following:

"Check out this new language I've been working on!"
"Here's a blog post on how I implemented static type checking into this compiler"
"I want to write a compiler, where do I start?"
"How does the Java compiler work? How does it handle forward declarations/imports/targeting multiple platforms/?"
"How should I test my compiler? How are other compilers and interpreters like gcc, Java, and python tested?"
"What are the pros/cons of ?"
"Compare and contrast vs. "
"Confused about the semantics of this language"
"Proceedings from PLDI / OOPSLA / ICFP / "

See /r/ProgrammingLanguages for specific examples

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armchair_progamer@programming.dev

If Inheritance is so bad, why does everyone use it? (buttondown.email)

submitted 7 months ago by armchair_progamer@programming.dev to c/programming_languages@programming.dev

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This essay says that inheritance is harmful and if possible you should "ban inheritance completely". You see these arguments a lot, as well as things like "prefer composition to inheritance". A lot of these arguments argue that in practice inheritance has problems. But they don't preclude inheritance working in another context, maybe with a better language syntax. And it doesn't explain why inheritance became so popular in the first place. I want to explore what's fundamentally challenging about inheritance and why we all use it anyway.

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[–] xigoi@lemmy.sdf.org 3 points 7 months ago* (last edited 7 months ago) (1 children)

Mathematically, the union of disjoint sets is often called the sum. This is a natural name because when you look at the number of elements (or in general, any measure), it will be the actual numeric sum.

[–] onlinepersona@programming.dev 1 points 7 months ago (1 children)

Why the emphasis on "disjoint"? Aren't integers a subset of floats? Would that mean then that int | float is incorrect?

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[–] xigoi@lemmy.sdf.org 4 points 7 months ago

In most programming languages, integers are not considered a subset of floats, so when you have the type Int | Float, you can distinguish 3 from 3.0.