Minimal Implementation of Functional Lenses

Provides utilities to create and use lenses to simplify data manipulation. Lenses are composable getter/setter pairs that provide a functional approach to manipulating deeply nested data structures, e.g., elements within list columns in data frames. The implementation is based on the earlier 'lenses' R package < https://github.com/cfhammill/lenses>, which was inspired by the Haskell 'lens' package by Kmett (2012) < https://github.com/ekmett/lens>, one of the most widely referenced implementations of lenses. For additional background and history on the theory of lenses, see the 'lens' package wiki: < https://github.com/ekmett/lens/wiki/History-of-Lenses>.

tinylens

The goal of tinylens is to provide a minimal set of tools for working with lenses in R.

As of the initial release, this is basically a re-implementation of the lenses package (https://github.com/cfhammill/lenses).

Installation

You can install the development version of tinylens from GitHub with:

# install.packages("pak")
pak::pak("arbelt/tinylens")

Example

The main benefit of lenses is that they are composable, and so allow for more streamlined transformations of nested data structures.

library(tinylens)
## basic example code