The web content provides code snippets in a functional programming style to work with rectangles, positions, and trees. It demonstrates functions for calculating the area of a rectangle, converting rectangle-like data structures to rectangles, checking if all elements in a list are the same, and flipping positions. It also includes a tree class with a method to flatten it. An intriguing concept introduced is using macros to simplify the creation of rectangles and calculating their areas. The content offers a hands-on approach to working with data structures and functions in a functional programming paradigm.
https://rhombus-lang.org