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Immutable.js vs lodash: What are the differences?

Introduction This Markdown code provides a comparison between Immutable.js and lodash, highlighting the key differences between the two libraries.

1. Immutable.js: Immutable.js is a JavaScript library that provides immutable data structures to improve performance and simplify complex operations on collections, such as lists and maps. Unlike normal JavaScript objects and arrays, Immutable.js data structures do not allow direct mutation, ensuring that the data remains unchanged.

2. lodash: lodash is a utility library for JavaScript, offering a wide range of functions to manipulate and work with arrays, objects, strings, and more. It provides convenient methods for iterating, manipulating, and transforming data, making it easier to handle common programming tasks.

3. Difference 1: Data Mutability Immutable.js enforces immutability, meaning that once a data structure is created, it cannot be modified directly. Any operation that would produce a different result from the original structure creates a new structure, preserving the integrity of the original data. On the other hand, lodash works with mutable data structures, allowing direct modification of objects and arrays.

4. Difference 2: Persistent Data Structures Immutable.js employs persistent data structures, which ensure that previous versions of the data structures are not updated but copied with the required changes. This approach enables efficient memory usage and allows for better performance in scenarios where multiple versions of the data are required. Lodash, on the contrary, does not offer persistent data structures by default.

5. Difference 3: Immutable vs Mutable operations Immutable.js provides specific methods for performing operations on immutable data structures. These operations are optimized to create new data structures with minimal changes and optimized memory usage. In lodash, operations are primarily focused on mutable data structures, allowing for more flexibility but potentially sacrificing performance in some cases.

6. Difference 4: Functional Programming Paradigm Immutable.js promotes a functional programming style where data remains unchanged. It encourages developers to use pure functions for transformation and avoids side effects. Lodash, while providing functional-style utilities, also supports imperative programming paradigms, allowing for a mix of different programming styles.

7. Difference 5: Performance Impact Immutable.js, due to its immutability and persistent data structures, can provide better performance in scenarios where data is frequently modified or multiple versions are required. However, the extra overhead of creating new data structures can impact performance in cases where mutability is preferred. Lodash, being more flexible with its mutable approach, might have better performance in scenarios where direct mutation is the desired behavior.

8. Summary In summary, Immutable.js enforces immutability, utilizes persistent data structures, offers specific methods for immutable operations, promotes a functional programming paradigm, and can provide better performance in certain scenarios. Lodash, on the other hand, works with mutable data structures, does not provide persistent data structures by default, supports both functional and imperative programming paradigms, and may have better performance in scenarios favoring direct mutation.

Decisions about Immutable.js and Lodash

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 Lodash
  • 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
  • 2
    Better than Underscore
  • 1
    Simple
  • 0
    Better that Underscore

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Cons of Immutable.js
Cons of Lodash
    Be the first to leave a con
    • 1
      It reduce the performance

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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 Lodash?

    A JavaScript utility library delivering consistency, modularity, performance, & extras. It provides utility functions for common programming tasks using the functional programming paradigm.

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    What companies use Immutable.js?
    What companies use Lodash?
    See which teams inside your own company are using Immutable.js or Lodash.
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    What tools integrate with Immutable.js?
    What tools integrate with Lodash?
      No integrations found
      What are some alternatives to Immutable.js and Lodash?
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      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.
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      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.
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      Python is a general purpose programming language created by Guido Van Rossum. Python is most praised for its elegant syntax and readable code, if you are just beginning your programming career python suits you best.
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