| layout | title | permalink |
|---|---|---|
docs-core |
Day |
/arrow/ui/day/ |
When building user interfaces, it is common to have two screens side by side evolving their states independently. In order to implement this behavior, we can use Day.
Day is a [comonadic]({{ '/arrow/typeclasses/comonad' | relative_url }}) data structure that holds two Comonads and a rendering function for both states.