It is very cumbersome to not having the 'copy' or equivalence so that a lot of functional languages have similar things: F#: let updated = { old with prop = ne

It is very cumbersome to not having the 'copy' or equivalence so that a lot of functional languages have similar things: F#: let updated = { old with prop = newValue } Elixir: update = %{ old | prop: newValue } Even JavaScript have similar stuff: const update = { ...old, prop: newValue }