If you come from an OOP background, you may have noticed a very interesting aspect throughout our discussion of types. Unlike other languages, objects in Julia do not define behavior. That is, Julia's types only define fields (properties) but do not encapsulate functions.
The reason is Julia's implementation of multiple dispatch, a distinctive feature of the language.
Multiple dispatch is explained in the official documentation as follows:
"The choice of which method to execute when a function is applied is called dispatch. Julia allows the dispatch process to choose which of a function's methods to call based on the number of arguments given, and on the types of all of the function's arguments. This is different than traditional object-oriented languages, where dispatch occurs based only on the first argument [
...]. Using all of a function's arguments to choose which method should be invoked, rather than just the first, is known as multiple dispatch. Multiple dispatch is particularly...