npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2025 – Pkg Stats / Ryan Hefner

immutable-re

v0.0.15

Published

Persistent immutable collections for Reason

Downloads

123

Readme

Immutable Collections For Reason

Pure Reason implementation of persistent immutable data structures.

Features

Immutable-re provides a complete set of efficient persistent immutable data structures for Reason and OCaml, targeting both OCaml native and byte code compilation modes, as well JavaScript using BuckleScript.

The api includes concrete implementations of vectors, sets, and maps. Many implementations support transient mutability for efficient batch mutations. Additionally Immutable-re provides lazy functional iterators and sequences, along with type definitions for basic operators such as equality, comparison, and hashing.

For more details see the API docs.

Installing

Installing via NPM (JS Workflow)

npm install --save immutable-re

Installing immutable via OPAM (native workflow)

# On macOS, install opam via Homebrew:
brew update
brew install opam
# On Linux, see here (you will need opam >= 1.2.2): http://opam.ocaml.org/doc/Install.html

opam init
# Add this to your ~/.bashrc (or ~/.zshrc):
#   eval $(opam config env)

opam update
opam switch 4.02.3
eval $(opam config env)
opam install immutable

Contributing to development

# On macOS, install opam via Homebrew:
brew update
brew install opam
# On Linux, see here (you will need opam >= 1.2.2): http://opam.ocaml.org/doc/Install.html

opam init
# Add this to your ~/.bashrc (or ~/.zshrc):
#   eval $(opam config env)

opam update
opam switch 4.02.3
eval $(opam config env)
git clone [email protected]:facebookincubator/immutable-re.git
cd immutable-re
opam pin add -y immutable .

Status

Immutable-re is under active development and is not yet production ready. We are releasing this early alpha to get community input and contributions. If you are interested in contributing please follow the directions here.

For JavaScript developers needing production ready immutable collections, we recommend using the Reason BuckleScript bindings to Immutable.js.

License

Immutable-re is BSD-licensed. We also provide an additional patent grant.