Mike Ash personal blog
Covariance and Contravariance
Subtypes and supertypes are a common part of modern programming. Covariance and contravariance tell us where subtypes are accepted and where supertypes are accepted in place of the original type. This shows up frequently in most of the programming most of us do, but many developers are unaware of the concepts beyond a…
- Points
- 156
- HN comments
- 67
- Submissions
- 1
- Cited by
- 0 commenters
On Hacker News
| Submitted | Title on HN | Points | Comments |
|---|---|---|---|
| Nov 21, 2015 | Covariance and Contravariance by marvel_boy | 156 | 67 |
