result-type-ts

A TypeScript library for the Result type

v2.2.0 URL: https://unpkg.com/result-type-ts@2.2.0/dist/index.mjs

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Result Monad functional error-handling Either Algebraic-Data-Types Coproduct

typed-utilities

Strongly typed general purpose utilities

v1.19.0 URL: https://unpkg.com/typed-utilities@1.19.0/build/index.js

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utils utilities Result Option Either Array Generator Iterator typescript

result-js

Rusty Monad Results for JS

v4.0.2 URL: https://unpkg.com/result-js@4.0.2/index.js

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Rust Result Monad Either Maybe

typecat

A tiny functional programming library for TypeScript that provides Option (Some/None) and Either(Left/Right) with functor map, applicative map and monad flatmap

v0.1.18 URL: https://unpkg.com/typecat@0.1.18/lib/index.js

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Functional Catatgory Functor Applicative Monad Option Either

igogo

Fast Either and Maybe from Fantasy Land with Flow and TypeScript support

v1.9.0 URL: https://unpkg.com/igogo@1.9.0/lib/index.js

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Maybe Either ADT Flow TypeScript TS FL Fantasy Land