traverse an array by accessing the childrens and parents of a node. You can obtain also the dingle children/value xpath

stackage implements flexible stack and condition types with useful features

FilterIterators for two-dimensional Traversables.

Traverse over structure with Alternative

Pagination Calculator for large collections. Good for JsonAPI and paginated output.

Functional Programming for C# and .NET Core

The "Collections" library for PHP array-like objects.

Homework to practice Foldable, Traversable, State/Parser, Monad Transformers and Combinators, Arrow, and Lens

PHP array-like object functions library.

An Erlang/OTP library for reading and updating deeply nested immutable data.

🚀 A fast lookup library that help you verify and search array and Traversable data.

Provides functions for iterable variables: iterable_map(, iterable_filter(), iterable_to_array(), ...

pure functional and generic programming for Erlang

Solutions to exercises from the book Haskell Programming

PHP Iteration Tools Library

Lambda the ultimate Pattern Factory: FP, Haskell, Typeclassopedia vs Software Design Patterns

Monads and other dark magic for Elixir

Functional patterns for Java