true-myth

A library for safe functional programming in JavaScript, with first-class support for TypeScript

v8.0.1 URL: https://unpkg.com/true-myth@8.0.1/dist/es/index.js

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typescript functional programming maybe result

junit-report-merger

Merges multiple JUnit XML reports into one.

v7.0.0 URL: https://unpkg.com/junit-report-merger@7.0.0/index.js

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junit xml cypress report test result merge combine

option-t

A toolkit of Nullable/Option/Result type implementation in ECMAScript. Their APIs are inspired by Rust's `Option<T>` and `Result<T, E>`.

v50.0.0 URL: https://unpkg.com/option-t@50.0.0/index.js

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either maybe maybe-type nullable option option-type result result-type

@expo/results

An efficient, standards-compliant library for representing results of successful or failed operations

v1.0.0 URL: https://unpkg.com/@expo/results@1.0.0/build/results.js

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result fulfilled rejected allsettled

happy-rusty

Porting some excellent design implementations from Rust to JavaScript.

v1.5.0 URL: https://unpkg.com/happy-rusty@1.5.0/dist/main.cjs

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rust enum Option Some None Result Ok Err