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Manifold Alternatives
Similar projects and alternatives to manifold
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money
The library supports arithmetic operations with monetary amounts, calculations with percentages, and allocation, making it simple to model use cases like installment payments (e.g., buy now, pay later), foreign exchange, investment yields, and tax collection. Cryptocurrencies are also fully supported out of the box. (by eriksencosta)
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NOTE:
The number of mentions on this list indicates mentions on common posts plus user suggested alternatives.
Hence, a higher number means a better manifold alternative or higher similarity.
manifold discussion
manifold reviews and mentions
Posts with mentions or reviews of manifold.
We have used some of these posts to build our list of alternatives
and similar projects. The last one was on 2025-03-12.
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The DuckDB Local UI
I’ve been using IntelliJ’s JDBC-based UI, this will add a lot more capability. I’m using the manifold-sql[1] project with duckdb for analytics, amazing.
1. https://github.com/manifold-systems/manifold/blob/master/doc...
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Exploring Polymorphism in C: Lessons from Linux and FFmpeg's Code Design
http://manifold.systems/
> Manifold is a Java compiler plugin, its features include Metaprogramming, Properties, Extension Methods, Operator Overloading, Templates, a Preprocessor, and more.
Neat tool. It is like having a programmable compiler built into your language.
- Show HN: Optional parameters and named arguments for Java
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Rails is better low code than low code
Yep. They demo great, but unless your use case is on the trivial end, you either find yourself making unreasonable compromises or, if the tool provides API escapes, you’re not only coding, but hacking against the tool.
In my view, mainstream languages like Java should offer static metaprogramming for library authors to make tooling like Rails possible and more approachable in IDEs.
The manifold project[1] has something like this for SQL, but it’s obviously providing its own static metaprogramming layer over Java. Shrug.
1. https://github.com/manifold-systems/manifold/blob/master/man...
- Type-Safe Data Science
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Show HN: TypeSchema – A JSON specification to describe data models
> 1) Yet another protocol etc.
Agreed.
> 3) The biggest challenge about data models is not auto-generated code
I would say auto-generated code is most definitely the harder problem to solve, and I’d also go out on a limb and say it is THE problem to solve.
Whether it’s JSON, XML, JavaScript, SQL, or what have you, integrating both data and behavior between languages is paramount. But nothing has changed in the last 40+ years solving this problem, we still generate code the same clumsy way… Chinese wall between systems, separate build steps, and all the problems that go with it.
Something like project manifold[1] for the jvm world is in my view the way forward. Shrug.
1. https://github.com/manifold-systems/manifold
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Kotlin Money
Generally, the idea is that there is no incompatibility between units. Money is a bit exotic given its abstract nature wrt units / exchange rates.
For instance, physical dimension store values as SI units, regardless of supplied unit, but retain the supplied unit type as a display hint.
Here, the Length dimension illustrates working with amounts of any unit.
Length orbit = 250 mi;
Length moon = 238000 km;
Length landing = moon + orbit;
display(landing); // prints 148,136.344 mi
display(landing.to(km)); // prints 238,402.336 km
// where
display(landing.to(mi) == landing.to(km)); // prints true
// perhaps a better example
Rate rate = 1.41 km/s;
Time duration = 76 hours;
Length distance = rate * duration;
// make your own unit constants
RateUnit kps = km/s;
rate = 1.41 kps;
You can play with the manifold-science[1] project, it implements the complete SI physical dimensions and many derived dimensions along with comprehensive operator overloading[2] support etc. to make working with and reading code using quantities more productive in Java.
1. https://github.com/manifold-systems/manifold/tree/master/man...
2. https://github.com/manifold-systems/manifold/tree/master/man...
- Show HN: Paranormal Metaprogramming with Java
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Favor composition over inheritance for Java via True Delegation
The advantages of composition (or "true" delegation) over inheritance are well documented, but many languages remain poorly suited for it, particularly Java.
In the influential book "Effective Java" the author advocates favoring composition over inheritance, yet Java provides little support for it. One is left having to write or generate large portions of boilerplate code to achieve the most basic form of interface composition. More pragmatic support for the feature requires language/VM intervention, such as with true delegation and mix-in traits. This isn't to say the author's claims about inheritance and composition aren't well intentioned, however in practice it is difficult to make use of this advice when the language he champions, nearly a quarter century later, still does little to facilitate his position. The library mentioned here works toward a remedy[1].
1. https://github.com/manifold-systems/manifold/blob/master/man...
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A Java Language Cumulative Feature Rollup
The manifold[1] compiler plugin for java offers a lot of features other languages like Kotlin provide, and innovates in some uniquely awesome ways like type-safe SQL.
1. https://github.com/manifold-systems/manifold
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www.saashub.com | 18 Mar 2025
Stats
Basic manifold repo stats
96
2,495
9.2
7 days ago
manifold-systems/manifold is an open source project licensed under Apache License 2.0 which is an OSI approved license.
The primary programming language of manifold is Java.
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