Julia doesn't even really have a distinction between user defined and base data structures. Every julia datastructure that's not needed for bootstrap is impleme

Julia doesn't even really have a distinction between user defined and base data structures. Every julia datastructure that's not needed for bootstrap is implemented in julia and all are on an equal footing with a datastructure I define at the repl. Even numbers. This is why julia is so powerful for so many different use-cases, when I make my own special custom array, number, string or whatever type, it's a first class citizen and with enough optimization will be just as fast, extensible and generic as whatever was provided by base.