For a more conservative FP-inspired R library there's `lenses` (disclaimer: I am a coauthor), which is available on CRAN, accessible to users familiar with R i

For a more conservative FP-inspired R library there's `lenses` (disclaimer: I am a coauthor), which is available on CRAN, accessible to users familiar with R indexing syntax, tidyverse-compatible, and has gentle introductory documentation: https://github.com/cfhammill/lenses https://github.com/cfhammill/lenses