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Immutable.js

413
120
+ 1
17
Underscore

1.8K
588
+ 1
290
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Immutable.js vs Underscore: What are the differences?

Developers describe Immutable.js as "Immutable persistent data collections for Javascript which increase efficiency and simplicity, by Facebook". Immutable provides Persistent Immutable List, Stack, Map, OrderedMap, Set, OrderedSet and Record. They are highly efficient on modern JavaScript VMs by using structural sharing via hash maps tries and vector tries as popularized by Clojure and Scala, minimizing the need to copy or cache data. On the other hand, Underscore is detailed as "JavaScript's utility _ belt". A JavaScript library that provides a whole mess of useful functional programming helpers without extending any built-in objects.

Immutable.js and Underscore can be primarily classified as "Javascript Utilities & Libraries" tools.

"Immutable data structures" is the top reason why over 6 developers like Immutable.js, while over 83 developers mention "Utility" as the leading cause for choosing Underscore.

Immutable.js and Underscore are both open source tools. Immutable.js with 27.6K GitHub stars and 1.6K forks on GitHub appears to be more popular than Underscore with 24.6K GitHub stars and 5.41K GitHub forks.

Pinterest, LinkedIn, and Coursera are some of the popular companies that use Underscore, whereas Immutable.js is used by Instagram, Rove.me, and Broadly. Underscore has a broader approval, being mentioned in 1047 company stacks & 76 developers stacks; compared to Immutable.js, which is listed in 20 company stacks and 11 developer stacks.

Decisions about Immutable.js and Underscore

Fast Healthcare Interoperability Resources (FHIR) provides standard data objects in JSON format for the healthcare industry. Since JSON objects are hierarchical and tree-like, we had a need to defensively 'pluck' fields from our JSON objects and do lots of mapping. We tried jQuery and Underscore and a few other technologies like FHIRPath; but Lodash has been the most well supported, works in the most contexts, has the cleanest syntax, etc. We particularly like the ES6 version of Lodash, where we can import the method names directly, without resorting to * or _ syntax. We got hooked on the 'get' function to defensively pluck fields from objects without crashing our user interface, and have found countless uses for the other lodash functions throughout our apps. Lodash is great for developing and optimizing algorithms.

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Pros of Immutable.js
Pros of Underscore
  • 8
    Immutable data structures
  • 5
    Allows you to mimic functional programming
  • 2
    Bring the functional experience to JS
  • 1
    Makes writing Javascript less scary
  • 1
    Easily transpiles to different ES standards
  • 85
    Utility
  • 55
    Simple
  • 40
    Functional programming
  • 32
    Fast
  • 28
    Open source
  • 20
    Backbone
  • 16
    Javascript
  • 8
    Annotated source code
  • 6
    Library

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- No public GitHub repository available -

What is Immutable.js?

Immutable provides Persistent Immutable List, Stack, Map, OrderedMap, Set, OrderedSet and Record. They are highly efficient on modern JavaScript VMs by using structural sharing via hash maps tries and vector tries as popularized by Clojure and Scala, minimizing the need to copy or cache data.

What is Underscore?

A JavaScript library that provides a whole mess of useful functional programming helpers without extending any built-in objects.

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What companies use Immutable.js?
What companies use Underscore?
See which teams inside your own company are using Immutable.js or Underscore.
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What tools integrate with Immutable.js?
What tools integrate with Underscore?
    No integrations found

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    What are some alternatives to Immutable.js and Underscore?
    Lodash
    A JavaScript utility library delivering consistency, modularity, performance, & extras. It provides utility functions for common programming tasks using the functional programming paradigm.
    Ramda
    It emphasizes a purer functional style. Immutability and side-effect free functions are at the heart of its design philosophy. This can help you get the job done with simple, elegant code.
    JavaScript
    JavaScript is most known as the scripting language for Web pages, but used in many non-browser environments as well such as node.js or Apache CouchDB. It is a prototype-based, multi-paradigm scripting language that is dynamic,and supports object-oriented, imperative, and functional programming styles.
    Git
    Git is a free and open source distributed version control system designed to handle everything from small to very large projects with speed and efficiency.
    GitHub
    GitHub is the best place to share code with friends, co-workers, classmates, and complete strangers. Over three million people use GitHub to build amazing things together.
    See all alternatives