(import std.Dict)

(let base (dict
  "name" "Rocket Skates"
  "price" "12.75"
  "color" "yellow"))
(let update (dict
  "price" "15.25"
  "color" "red"
  "year" "1974"))

(mut result (dict:copy base))
(dict:update! result update)
(print result)