WolframLang: No Reference Concept in List

No Reference Concept in WolframLang

in WolframLang, there is no concept of “reference”, every Expression (list or nested list) is literal.

In Python, JavaScript, Golang, Java, etc, list-like type has a value that's a “reference”. The reference concept for lists create a lot identity problems, especially when lists are nested, such as deep copy, shallow copy, clear vs reset, changing a copy changes the original, complex meaning mutability (e.g. in JavaScript, array can be assigned to a constant, yet array element or length can still change, because the “reference” remained constant.) etc.

These problems do not occur in WolframLang.