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#functional (3)

Cheat sheets (3)

effect — TypeScript Library for Effect Systems

Package-level reference for the Effect library — Effect values, generators, fibers, error channels, dependency injection, and the 2.x → 3.x migration.
npm package effect typescript functional

lodash — modular JavaScript utility library

Package-level reference for lodash on npm — modular imports, ES2020+ replacements, lodash/fp, debounce/throttle, and the honest 'you might not need this' framing.
npm package utility functional javascript

itertools & functools — Functional Toolbelt

The two stdlib modules every Python developer pairs together — iterator algebra (chain, groupby, batched, pairwise) and function plumbing (lru_cache, partial, reduce, singledispatch, cached_property).
python stdlib functional itertools functools