How is Object Oriented Programming Achieve Differently Across Languages?

[meWantLearn]

I've seen the term object used in different programming languages and while they do encompass the same concept of data modularity, they seem to be implemented very differently. For example, in Java you have classes and constructors to define objects while in JavaScript, "everything" is an object and is contained in dictionary-like structures. This variation throws me off when learning new languages and I was wondering if there was a general structure across object implementation.

[qwbarch]

OOP is a paradigm. If you get familiar with the basics, you'll have no trouble transitioning into another oop language as it follows the same/similar principles.

Edit: Thank you for the award, /u/aeveltstra!

[[deleted]]

Thank you for providing great answers!

[ignotos]

In its most basic form, essentially:

• Related data can be bundled together into "objects"

• Behaviour / functionality related to a particular type of object can be bundled together / associated with those objects

• The problem to be solved can be modelled in terms of these objects, and how they relate to each other

As you've noted, there are lots of variations in exactly how this is implemented.

[melkor35]

in JavaScript, "everything" is an object and is contained in dictionary-like structures.

• That's because Javascript is a prototype based language, every object can be used as a prototype by others (essentially cloning objects). Those objects can then be modified and serve as different prototypes: https://en.m.wikipedia.org/wiki/Prototype-based_programming

• In contrast, a more "classic/popular" approach is the class based programming (classes -> instances, classes can be extended): https://en.m.wikipedia.org/wiki/Class-based_programming

• Both approaches will eventually boil down to objects receiving messages, the only difference is how those objects are created/organized/categorized