Re:Rust vs. Haskell
by rkangel on Tuesday February 14, 2023 @08:14AM
(#34788798)
No, because you don't copy the whole structure. You create a new partial structure.
E.g. let's say you create a map with keys A and B. You then insert a new key C. In memory you might have two objects: One is the origi al map with A and B and the other has "Key C and a ref to the first map".
E.g. let's say you create a map with keys A and B. You then insert a new key C. In memory you might have two objects: One is the origi al map with A and B and the other has "Key C and a ref to the first map".