@thi.ng/associative

ES Map/Set-compatible implementations with customizable equality semantics & supporting operations
v7.1.17 URL: https://unpkg.com/@thi.ng/associative@7.1.17/index.js
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cachedatastructuredifferenceequalityhashintersectionjoinmapobjectsetsparsetrietypescriptunion

@codibre/fluent-iterable

Provides LINQ-like fluent api operations for iterables and async iterables (ES2018+).
v1.39.2 URL: https://unpkg.com/@codibre/fluent-iterable@1.39.2/dist/index.js
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iterableasyncIterablelinqmapfilterfluentstreamstreamsreadablemergecombineiteratorasyncIteratoriterationfunctionalcollectionarraymapsetfilterreduceflattenconcateverysomeflatflatMap

array-operations

This is JavaScript module for fastest array operations
v1.1.0 URL: https://unpkg.com/array-operations@1.1.0/app.js
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arrayfast arraysethashset operationsfastest array functionsoperationsarray differencearray uniquefiltermanipulationfor each performfast array functionsarray functionsarray utilarray flattenflatten array

venn

fluent API library for set operations
v1.1.2 URL: https://unpkg.com/venn@1.1.2/venn.min.js
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vennsetintersectunion

bolzano

set union & interset etc operations
v0.1.1 URL: https://unpkg.com/bolzano@0.1.1/index.js
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settheoryunionintersetdifference