[socialdemocrat]

pansa had a great answer so I will just add to that. Multiple dispatch is rare among programming languages and the few which do it only has it as an add-on.

I believe Julia is the only programming language where multiple dispatch is the way all function calls work. There are no exceptions. It is also the only language where it was used to aid a JIT compiler.

Once you dig into multiple dispatch and see how it affects everything from performance to Julia package design and how packages integrate with each other, you will just be blown away.

It is hard to convey how ingenious this solution is. Even the creators themselves have admitted they did not realize how clever this would end up being. They only realized after people started actively using Julia what a gold mine they had hit.