The interior mutability property applies more generally, such as to define a struct type where some fields are immutable and others are mutable. However, it’s especially useful for reference-cou ...

An immutable ... is itself a reference type but it uses its own built-in equality check — the equality is checked by value and not reference. Finally, note that records can be mutable but ...

I hope that it’ll be useful to those who already have a background in software or Python, but who are looking for an easy-to-scan reference to use in data analysis projects. Python is easy to ...

If you want, you can think of Strings as "immutable reference types" (but if you do then I think you're obliged to think of the other types as "mutable value types" or "mutable reference types"… which ...