pfts - Pragmatic Functional TypeScript

pfts is a opinionated TypeScript library heavily inspired by F#'s pragmatic and practical approach to functional programming, and by the way both it and Rust handles errors.

Goals

pfts's main goal is to make it easier to write clear, concise and correct code. The library is built to achieve this through abstractions (Option, Result, AsyncOption, AsyncResult, etc...) that helps keep your functions honest/predictable and make illegal states unrepresentable.

There also a couple of immutable collection types (Dict and List) with a much greater number of functions than the default JavaScript Map and Array types to facilitate development. pfts collection uses their own method names to help distinguish them from the JavaScript types (.e.g, list.forall() instead of array.every()).

pfts tries to keep things idiomatic to TypeScript, with the fact that JavaScript relies heavily on objects and the dot notation kept in mind when developing the library.

Getting started

Install pfts with

npm

npm install @pfts/core

yarn

yarn add @pfts/core

Docs

A good part of the functions have JSDoc comments with examples, and the plan is to eventually add JSDoc with examples to all of them. There are also docs & learning materials available.

Thanks

• FsToolkit.ErrorHandling For serving as inspiration to the public API of the library.
• Purify For their Codec type, which served as inspiration and great help when building the Validator type.
• Effect-TS For which without I wouldn't have been able to figure out how to abuse generators.