Exploring contravariance using Swift(pointfree.co)
pointfree.co
Exploring contravariance using Swift
https://www.pointfree.co/episodes/ep14-contravariance
1 comments
Warning: auto-playing audio.
Not if you're using a modern version of Safari. https://techcrunch.com/2017/06/05/auto-play-block/
Or even just a properly-configured firefox