Parrot Magic Cookies (PMCs).

• Four types of registers in Parrot (SNIP)
• native types are small, fast (JITable) and dumb.
• PMCs are ❝smart❞

• PMCs
• some data, and lots of functions.
• conversion to other types (string, int, num)
• keyed access for arrays, hashes.
• Many builtin Parrot PMCs. (String, Array, ResizableArray, Iterator, …)

With so many choices, never have to build your own!