Right fold superpowers!. On a related post,

A function is considered “pure”, if it is [referential transparent (RT)] for all RT arguments, meaning that the arguments passed into a function must be pure themselves. A side-effect, therefore, is anything that violates RT.

Making of the Illustrations of the Natural Orders of Plants.

In which Di Cook shared her insights and provided some very interesting historical account of Fisher-Anderson’s Iris data: Give Your Statistician Colleague Iris Bulbs for Their House Warming!.

Is this the next thing for Markdown?

On compatibility and reproducibility on the Stata blog. #stata

You can take a do-file written, say, almost 30 years ago in Stata 3, and as long as that do-file is marked with “version 3” at the top, it can be run, as-is, with no modification, in a modern Stata 16. No broken scripts. No broken programs. No additional effort.

Emacs mini manual, via Sacha Chua. #emacs

Real World OCaml. What a beautiful online book! #ocaml

Algebra, Topology, Differential Calculus, and Optimization Theory For Computer Science and Machine Learning (PDF, 1962 pp.). (via HN)

Nice bookdown of a Chapman & Hall book: Flexible imputation of Missing Data. #rstats

Introducing the Haskell Phrasebook. You may also like Rust by example. #haskell #rust