Hacker News
- Invariance, Covariance, and Contravariance in .NET C# https://www.developmentsimplyput.com/post/variance-invariance-covariance-contravariance-dotnet 3 comments
- Covariance and contravariance explained without code https://github.com/Dobiasd/articles/blob/master/covariance_and_contravariance_explained_without_code.md 11 comments
- Covariance and contravariance in C++ https://quuxplusone.github.io/blog/2019/01/20/covariance-and-contravariance/ 15 comments
- Covariance and contravariance in subtyping https://eli.thegreenplace.net/2018/covariance-and-contravariance-in-subtyping/ 13 comments
- What are covariance and contravariance? https://www.stephanboyer.com/post/132/what-are-covariance-and-contravariance 66 comments
- Covariance and Contravariance: a fresh look at an old issue [pdf] https://www.irif.univ-paris-diderot.fr/~gc/papers/covcon-again.pdf 26 comments
- Covariance and Contravariance https://mikeash.com/pyblog/friday-qa-2015-11-20-covariance-and-contravariance.html 67 comments
- Covariance and Contravariance in C++ Standard Library http://cpptruths.blogspot.com/2015/11/covariance-and-contravariance-in-c.html 4 comments
- Covariance, Contravariance, and Super Type Constraints http://hhvm.com/blog/9215/covariance-contravariance-and-super-type-constraints 9 comments
- What is Covariance and Contravariance Anyways? http://functional-orbitz.blogspot.com/2011/10/what-is-covariance-and-contravariance.html 16 comments
Lobsters
- Type Systems: Covariance, Contravariance, Bivariance, and Invariance explained https://medium.com/@thejameskyle/type-systems-covariance-contravariance-bivariance-and-invariance-explained-35f43d1110f8 7 comments plt
- What are covariance and contravariance? https://www.stephanboyer.com/post/132/what-are-covariance-and-contravariance 47 comments compsci
- Covariance and Contravariance in C# https://blog.ndepend.com/covariance-and-contravariance-in-csharp-explained/ 2 comments csharp
- A Practical Intro to Covariance and Contravariance in C# https://vkontech.com/a-practical-intro-to-covariance-and-contravariance-in-c/ 3 comments csharp
- Covariance and contravariance by example. https://dev.to/jozefchmelar/covariance-and-contravariance-by-example-289g 4 comments csharp
- Covariance and contravariance explained without code https://github.com/dobiasd/articles/blob/master/covariance_and_contravariance_explained_without_code.md 31 comments programming
- A Practical Intro to Covariance and Contravariance in C# https://vkontech.com/a-practical-intro-to-covariance-and-contravariance-in-c/ 3 comments dotnet
- Strict function types in TypeScript: covariance, contravariance and bivariance https://codewithstyle.info/strict-function-types-in-typescript-covariance-contravariance-and-bivariance/ 5 comments typescript
- What covariance, contravariance, and invariance are and why you should know them to write better code. Multiple Python examples included https://blog.daftcode.pl/covariance-contravariance-and-invariance-the-ultimate-python-guide-8fabc0c24278 18 comments programming
- Covarience vs Contravarience within Function Scopes http://blog.technically.fun/2018/09/covarience-vs-contravarience-within.html 23 comments programming
- Illustrated Guide to Covariance and Contravariance (in Kotlin, but applies to many languages) https://typealias.com/guides/illustrated-guide-covariance-contravariance/ 9 comments programming
- What are covariance and contravariance? (x-post from /r/programming) https://www.reddit.com/r/rust/comments/6p6w1d/what_are_covariance_and_contravariance_xpost_from/ 19 comments rust
- What are covariance and contravariance? https://www.stephanboyer.com/post/132/what-are-covariance-and-contravariance 45 comments programming
- Tensors Explained Intuitively: Covariant, Contravariant, Rank https://www.youtube.com/watch?v=CliW7kSxxWU 28 comments math
- Flow's best kept secret: covariance and contravariance for read-only and write-only variables https://medium.com/@forbeslindesay/covariance-and-contravariance-c3b43d805611 2 comments javascript
- Covariance and Contravariance :: FP Complete https://www.fpcomplete.com/blog/2016/11/covariance-contravariance 18 comments haskell
- Type Systems: Covariance, Contravariance, Bivariance, and Invariance explained https://medium.com/@thejameskyle/type-systems-covariance-contravariance-bivariance-and-invariance-explained-35f43d1110f8 10 comments programming
- Cheat Codes for Contravariance and Covariance http://blog.originate.com/blog/2016/08/10/cheat-codes-for-contravariance-and-covariance/ 5 comments scala
- Covariance and contravariance with Java Generics https://advancedweb.hu/2016/05/03/java_variance/ 4 comments java
- Covariance and Contravariance https://mikeash.com/pyblog/friday-qa-2015-11-20-covariance-and-contravariance.html 6 comments programming
- Trying to follow Susskind's derivation of the covariant derivative of a contravariant tensor, can someone look at my work and tell me where I went wrong? http://www.youtube.com/watch?v=YdnLcYNdTzE#t=8m30s 10 comments math
- Covariance and Contravariance http://www.stephanboyer.com/post/39/covariance-and-contravariance 5 comments compsci
- The theory behind covariance and contravariance in C# 4 http://tomasp.net/blog/variance-explained.aspx 40 comments programming
- Understanding covariance and contravariance in OCaml http://ocaml.janestreet.com/?q=node/99 18 comments programming
- A categorical view of covariance and contravariance in C++ http://fedelebron.com/categorical-view-covariance-and-contravariance-c 12 comments cpp
- Covariance and contravariance - simple explanation http://coding-time.blogspot.com/2011/05/covariance-and-contravariance-simple.html 25 comments programming