box_advanced.md

META

description=Advanced Box usage: nested boxes, with functions, refcounting
type=repl

SOURCE

» Box.unbox(Box.unbox(Box.box(Box.box(42))))
» (|x| x * 2)(Box.unbox(Box.box(21)))
» Str.concat(Box.unbox(Box.box("shared")), Box.unbox(Box.box("shared")))

OUTPUT

42.0

42.0

"sharedshared"

PROBLEMS

NIL