Immutable collections and tools for TypeScript

Usage no npm install needed!

<script type="module">
  import rimbuCore from 'https://cdn.skypack.dev/@rimbu/core';



This package exports all the Rimbu collections, plus the contents of the @rimbu/common package. Its aim is to provide an easy to use access point for the collections.

For complete documentation please visit the Rimbu Docs.

Or Try Out Rimbu in CodeSandBox.


To get started with the immutable collections, which are exported through @rimbu/core, you can use the following.


For yarn:

yarn add @rimbu/core

For npm:

npm i @rimbu/core


Create a file called rimbu.ts and add the following:

export * from 'https://deno.land/x/rimbu/core/mod.ts';

Or using a pinned version (x.y.z):

export * from 'https://deno.land/x/rimbu/core@x.y.z/mod.ts';

Then import what you need from rimbu.ts:

import { HashMap } from './rimbu.ts';

Because Rimbu uses complex types, it's recommended to use the --no-check flag (your editor should already have checked your code) and to specify a tsconfig.json file with the settings described below.

Running your script then becomes:

deno run --no-check --config tsconfig.json <your-script>.ts


Using direct imports:

import { List, Stream, SortedMap } from '@rimbu/core';

const list = List.of(1, 3, 2, 4, 2);

const stream = Stream.from(list).map((v) => [v, String(v * 2)]);

const map = SortedMap.from(stream);

// => [[1, '2'], [2, '4'], [3, '6'], [4, '8']]

The same code using the Create menu-object:

import Rimbu from '@rimbu/core';

const list = Rimbu.Create.List.of(1, 3, 2, 4, 2);

const stream = Rimbu.Create.Stream.from(list).map((v) => [v, String(v * 2)]);

const map = Rimbu.Create.Map.Sorted.from(stream);

// => [[1, '2'], [2, '4'], [3, '6'], [4, '8']]


This package exports everything from the following packages:

Name Description
@rimbu/bimap a bidirectional map in which keys and values have a one-to-one mapping
@rimbu/bimultimap a bidirectional multimap in which keys and values have a many-to-many mapping
@rimbu/collection-types definitions for many of the generic collection types, used to derive more specific implementations
@rimbu/common contains public types and functions that are used throughout the whole library
@rimbu/deep offers tools to use handle plain JS objects as immutable objects. library
@rimbu/graph provides various graph implementations to represent data in forms of nodes and edges
@rimbu/hashed provides a HashMap and HashSet implementation, using hash functions to efficiently retrieve keys
@rimbu/list provides the List datastructure containing an ordered sequence of elements that can be manipulated and accessed randomly in an efficient way
@rimbu/multimap provides a map in which keys and values have a one-to-many mapping
@rimbu/multiset provides a set in which elements can occur multiple times
@rimbu/ordered provides the OrderedSet and OrderedMap collections, that keep insertion order
@rimbu/sorted provides a SortedMap and SortedSet implementation, using compare functions to efficiently keep the elements sorted
@rimbu/stream contains methods to easily manipulate sequences of data
@rimbu/table provides various Table data structures where a combination of a row key and column key maps to a single value.


Arvid Nicolaas


Feel very welcome to contribute to further improve Rimbu. Please read our Contributing guide.


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Licensed under the MIT License, Copyright © 2020-present Arvid Nicolaas.

See LICENSE for more information.