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Functional patterns for Java
java lambda functional-programming tuples io-monad algebraic-data-types monad functor lenses monoid semigroup optics either hlist profunctors traversable coproduct maybe-monad bifunctors try-monad
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May 1, 2023 - Java
A multiplatform Result monad for modelling success or failure operations.
kotlin ios functional browser js functional-programming jvm class fp monad type result either kotlin-multiplatform
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Dec 15, 2025 - Kotlin
Functional programming library for TypeScript - https://gigobyte.github.io/purify/
typescript functional-programming algebraic-data-types monad functor decode codec option-type fantasy-land maybe either result-type
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Dec 16, 2025 - TypeScript
The most powerful IO monad implementation in JS, possibly in any language!
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Dec 13, 2025 - JavaScript
Option, Result, and Either types for TypeScript - Inspired by Rust 🦀
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Oct 20, 2025 - TypeScript
Either and Maybe monads for better error-handling in C++
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Oct 31, 2019 - C++
A small typed and safe library for error handling with functionnal programming concept in Dart and flutter project
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Oct 31, 2022 - Dart
Functional programming for deno and javascript. Monads, semigroups, optics, parsers, state management, yadda yadda yadda.
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Nov 16, 2025 - TypeScript
The TypeScript Standard Library
list library typescript immutable functional curried composition standard lenses future maybe either
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Dec 3, 2022 - TypeScript
Handle side-effects in Python like a boss. Implements functional types for Either, Option, Try, and Future.
python monads python3 monad try option-type future option either futures python27 hacktoberfest try-catch either-monad future-monad try-monad option-monad hacktoberfest-accepted hacktoberfest2023
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Jul 15, 2024 - Python
A short course on Functional Programming in Typescript
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Jan 5, 2022 - TypeScript
Either class for Dart or Flutter projects.
dart functional-programming error-handling flutter either dart-either either-dart dart-functional-programming dart-either-monad
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Jun 10, 2023 - Dart
Result, Either, Try, and Maybe monadic types for Java
java monads types jvm algebraic-data-types error-handling try jdk adt result either sum-types railway-oriented-programming either-monad result-type maybe-monad try-monad result-monad sealed-class
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May 7, 2025 - Java
Implements Either, Maybe and Tuple monads.
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Apr 30, 2017 - TypeScript
Common applicatives, functors and monads for loads of /fun/ with Python
python lambda haskell functional-programming fp monad functor optional maybe either just hacktoberfest applicative
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Jun 10, 2025 - Python
Functional error handling for Java
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Oct 24, 2024 - Java
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