For slightly more advanced value objects, check out the gem[1] I wrote. It has a bit more depth in how it "enhances" every attribute to behave as you'd expect,

For slightly more advanced value objects, check out the gem[1] I wrote. It has a bit more depth in how it "enhances" every attribute to behave as you'd expect, to improve the object's clone-ability, freezability, inheritability, declarative style of attribute definition, and a few more perks. All while remaining super small/simple in the way it's implemented. [1]: https://github.com/maxim/portrayal https://github.com/maxim/portrayal